A continuation of the Deep Learning specialization, this course actually teaches many of the latest ideas in hyperparameter optimization and builds up the ideas nicely. Concepts like EWMA, RMSProp, Momentum and Adam were well explained and logically introduced. One gripe I have is Tensorflow - despite not liking the framework much (primarily because of its terrible error messages), I found that the foundational learning for key concepts in TF were not well introduced. There was only one video which served as a Tensorflow introduction. Other than this, the course was great.

It's really great to the get the key insights from someone as Andrew Ng. I read some materials before in books, tutorials and other sources. But this course actually put it all into perspective and gave many aspects context which I was missing before. Thank you Andrew. If there would be one thing I would suggest to improve its the assignments. I missed using the batch norm and seeing its effect and also to actually improve the parameters of some DNN in some kind of search as was explained. But I understand that I might have been too much or rather too demanding.

TensorFlow uses slightly different terminology. That took some time to get used to. Also, because of so many algorithms, parameters, it becomes difficult to remember everything. It would be nice, if we could search for terms and either get to the point in video where the terms are mentioned and explained or results contain sections of slides as presented in the video. If this kind of search works across all the courses in a specialization, that would also be great. Overall, Andrew Ng makes it really easy to understand and I am glad I am making progress.

Very good presentation material and deep intuitive explanation by Professor Andrew NG . Quizzes are structured in a way that it will test all the sections you have learned in that week.Programming assignments will provide an idea on how to approach each of the problems.In addition to taking this course,I would also recommend you to try and code using the basic code structure presented in the lecture and assignments to build upon and see what works and what does not in the problems.Only then,you can see the benefit of what is taught in this lecture.

Very good course for those who wants to start their career in Deep learning. One thing which disappointed me was programming assignments. Some functions and libraries of python and Tensorflow used in assignments are not well explained for students. How can a student understand if he wants to write code from scratch to develop an algorithm. Only small function or some logics are allowed to write by students in assignments which is not enough to build confidence. Many libraries imported are not explained. Theory part of course was excellent.

Theoretical part amazing, explanations very comprehensive. I think is the best course on deep learning right now. The one thing i would like to see improved is the structural choice for the practical part: this concept of functions that already built in and we come in and fill in the code is ok, and it helps, but i think there should be some kind of path where we can build everything from scratch and you guys could provide the answers as something we can check to see if we got it right...i don't maybe could help, but overall amzing course.

Pro: The course content is well explained and the examples are usually understandable. There are some well explained programming exercises that allow you to get in touch with the "machine room".

Con: Not enough programming exercises to explain all concepts and also the programming exercises sometimes boil down to copy&pasting some code from the instructions. Furthermore, I would expect that this couse with "intermediate" difficulty would allow you to really write code from scratch at some point instead of filling in "Jupiter" notebooks.

The content is great as usual, but I have two minor complaints: the quality of prof. Ng's handwriting went down, which sometimes makes it more difficult to follow the explanation, or taking notes; the second one is that the error reporting for the grader on the programming exercises is not very user-friendly. I had to try a couple times on weeks 2 and 3 not because my code was wrong at all, but because the grader was finicky. Due to the honor code, I believe I won't be able to post more details here, but check on the forums.

The content is great, let me say that first and foremost. I feel like some small improvements would be that there were some typos in the notebooks, but not big deal. Helps one learn about debugging and think independently.

About the TensorFlow section of week 3. It was a pretty deep dive into TensorFlow, and I ended up going to the documentation a lot. Maybe some background on the framework would help. I will probably next go through the TensorFlow "getting started" tutorial, to better understand it.

The course is pretty good. I just feel notation used by Andrew is quite confusing for people with matrix algebra and matrix calculus. I understand the course is intended for people with different knowledge leveles but generalizing notation with matrix algebra could be save time for students.

There are some little bugs on the last Jupyter implementation with TensorFlow. Nothing too serious but reading the forums I noticed bugs were reported one year ago and nothing has been done to fix them.

This was a great course with a great assignment. The assignments were moderately hard to complete. I think if students were challenged to improve accuracy of the model by a X%(10%) for extra credit. It this would have triggered independent thinking. I think Students can do it without extra credit also. I think extra credit from Instructor triggers different incentive to complete it. This was done to some extent in the 1st course. I think doing it in this course also would have been ideal.

The course presented a number of practical techniques for implementing DNNs. The presentation was clear and sufficiently detailed to give a grounding in the techniques. Dr. Ng makes the material accessible while still offering technical details and insights that make the course both interesting and useful. The programming assignment forced me to dig into the documentation for tensorflow, which was at first frustrating, but in then gave me a much better understanding of what was going on.

Many many thanks for putting this great deep learning specialization together!!!

For course 2, it took long long to get to the meat of the course, i.e. hyper parameter tuning, and yet there were no exercises to grasp how we can tune (more than one) hyper parameters through programming exercise. Perhaps we will learn that in course 3. I haven't done it yet.

The first course exercises were more effective.

Other than this comment, everything else for this specialization course looks awesome.

Hyperparameter tuning to improve performance of model is one of the most important part of lifecycle of development of any machine learning model. I would say with confidence now that I have at least got intuition of how different hyper parameters affect the performance of model and how to obtain the optimal value of them. I have got some imagination around hyper-parameters. Thank you Andrew and all team for taking diligent efforts to make this course easy to understand.

Course content was complex, yet progressive, helping to grasp key concepts easily. I think the assignment material can be improved. For instance, I got a full grade on the Tensorflow assignment, but my compute_cost function was wrong (hadn't passed the right arguments to the tf cross-entropy cost function). Some of the assignment instructions are also unclear at times.

Overall, this course helps build some invaluable skills for practical machine learning applications.

Theoretical foundation on algorithms and tuning and also insights on these topics are amazing. However, I would have loved to see a more detailed intro to TensorFlow, as W3's assignment is quite challenging for someone who's never worked with the framework before. I know there's an option for taking a course prior to the assignment, but at least in my case it wasn't possible for time constraints. Maybe mentioning that prior TF knowledge is required would also help.

4* only because the TensorFlow lectures and assignment were too much in too little time. Also from what I see, TF has massively changed syntax to 2.0 so it felt a bit pointless to learn TF1 syntax (which is ***horrible***) at this point. To me it detracted a lot from the learning experience.

The remaining lectures and modules were excellent as usual though. I'd still recommend this highly, and Andrew's insights into what tends to work and why are brilliant as always.

Another great course, the amount of information per week is right on point (not too packed and not too poor). Also, it was interesting to go behind the scenes and learn what batch normalization and regularization actually does and how it can actually help a neural network perform better. And, to top it off, it gives a brief introduction on TensorFlow and how to use it, although it would have been better if the course thought the material on TF 2.0 instead of 1.0.

The course is great!

It really helps in understanding how the algorithms work, under the hood and the implementation tips

are very helpful! (This is visible in both the Optimization and Batch Normalization algorithms sections)

It is awesome that a programming framework is also introduced in the course, Tensorflow. But to be honest PyTorch could be also introduced, in order to select the framework in which the student could implement the last programming assignment.

The content covers a wide variety of useful topics in deep learning. Andrew's explanations are sufficient, as are his use of both examples and analogies. I was only slightly disappointed to see that he has left the derivation of the equations governing back propagation along a batch normalized neural network as an exercise to his audience. The quizzes were sufficiently challenging, and the programming exercises were either informative or insightful, or both.

I felt this interesting but bit easier compared to the first course. Please don't provide the parameters of a method directly in the description above. I want to learn how this method can be executed by thinking and understanding the parameters I have to pass to this method. So, I felt the tensorflow assignment little straight forward. But overall a very good course. I need to practice a lot to actually understand and write the code from scratch. Thank you.

I wish to give 4.5 instead. The only pitfall is the whole video series have a high frequent sound which keep distracting me when try to concentrate to the content.

content vise is very good. Coding practice is very helpful in understand the process. However there is only a basic level. With giving too much help on the background, it's very easy forget afterwards. May be a suggestion more practice would be better.

After all, it's the best course in DL for me.

The number of mathematical symbols grows quickly, and I started getting a little lost trying to remember which Latin or Greek symbol meant what and in which context. Still, I think that I've learned enough about overfitting (bias), underfitting (variance), regularization, adaptive learning rates, and normalization that I'll at least have the concepts in mind moving forward, even if I didn't memorize the equations and code necessary to do it from scratch.

This was a good course to deal with some of the inner working of the machine learning and neural network models. It was good to see one of the existing frameworks (TensorFlow); although, I find it to be more difficult to configure than Torch (PyTorch). And it was unclear from the lab whether or not this framework was using GPU acceleration; although, this could probably be determined with a little research and experimentation in the lab environment.

This is a great overview for those wanting their neural networks to run more effectively and efficiently. Lots of ideas to improve your networks. The documentation and description of Tensorflow for the exercises is inadequate to be able to diagnose errors in the "expected" code without expert assistance. When debugging Tensorflow for these exercises, its almost a Trial and Error exercise instead of using first principles taught in the presentations.