Professor Bennoun is goated. Mbappe in the World Cup final type of goated. You only get one homework and one lab assignment per week, which is completely manageable. Midterm and Final is fairly easy to study and prepare for. Most learning is done by doing the homework. If you do the homework honestly and look at the answers after the due date then you should be fine. The coding is not too difficult, you just have to be patient with it. Overall, I would take again and recommend, but this class is not for those who like to complain when faced with a bit of difficulty.

He taught LS30A so good that he tricked me into taking 30B

First of all I would like to say I enjoyed this class a lot more than 30A because the material was more math based and just easier to understand. Everyone says 30A is a lot easier but I disagree. However, Professor Bennoun teaches 30A a lot better than 30B so be prepared to be confused in lectures and to teach yourself when your trying to solve the homework problems. In lectures, he goes over very brief concepts but the actual material you need to know for the final and midterm go in a lot more detail. The midterm was pretty easy for this class, but the final was a lot harder. No matter how much I studied, the final covered questions that were meant to trick you, content that you briefly covered in lecture and overall just a difficult test that is worth 60% of your grade. Luckily I did better than I thought which saved my grade. Additionally, the labs for this class are a lot more difficult than 30A and most of the time you're not going to finish in section. Especially the last few labs are very difficult but if you get lucky with a good T.A. your life will be so much easier. Lastly, the capstone project was not bad at all and was extremely doable since the TA's allowed the students to use Chat GPT for it.

I should've done a lot better in this class than I did. Overall the class was very manageable with homework and labs, but I hated going to the labs and my TA absolutely sucked for my lab. If you have a good TA, this class is a lot easier. If you put effort into the homework and check the answers once they're graded, you should be fine. The midterm was much easier than the final, which I did not do well on. The final was unexpectedly difficult for me, but to each their own.

Prof. Bennoun is great at teaching the material (just like 30A). Although there were some times where he just over explains which might get one confused. From someone who didn't to the best in 30A, 30B material is much lighter than 30A, heavily focused on linearity and matrices. The midterm was much easier than the final in my opinion. The HWs are about the same workload, the only difference is that now we use some textbook practice exercises.
For the Labs, during the first half of the quarter it was not too bad. You are able to do them on your own without much help from TAs. But then they start getting longer and complicated. The two hours during lab was never enough time to finish. But that might just be bc my TA would spend the first hour making us work on a warm up exercise that no one paid to much attention to. The point is, the coding get more complicated, so seek help when you need it. The worst part was how we had to do a capstone project in addition to labs. Your told its recommended to meet with your group outside of lab but tbh my group never meet up and would just work on a shared doc and communicate as needed. The project is not graded too heavily but as long as you have an idea of what you are doing you will be fine.
I thought I was going to fail the class once I took the final. Throughout the whole 30B quarter, I felt like I knew the material pretty well. I found the practice finals to be simple and most of the Homework's aswell. The final was nothing like the practice final. They ask basally the same question/concept, but in a different way which is why you NEED to understand the why to every question, not just the process. The final is what really dropped my grade so as long as you have good scores in everything else, you should be fine. I would recommend taking Bennoun as he can make the lecture interesting and tries his best to engage with students.

LS30B is going to be significantly more difficult than 30a. Everything you learned in 30a like oscillations, time series, and trajectores will all be amplified and expanded upon. There is more math than can be very complex at times like multivariable calculus and partial derivatives. I have had roommates tell me this like Calc 2 or 3 concepts which is pretty crazy for this class. Some of the math is also very bizarre and more conceptual based. Often times it felt like this class has very limited resources. Sure there is office hours, but it you're like me who likes watching youtube videos and khan academy its going to be rough. The labs are also hardy, they don't hold your hand like in 30a. Honestly, totally manageable though, just go to office hours and compare the work with others. The tests are also graded pretty harshly. The midterm had to be regarded because of a certain question's weird and strict grading scale. BE PREPARED TO STUDY WAY MORE THAN 30A.

Bennoun is a great guy, but the class itself isn't really that great. His lectures are easy to understand because it's in a fill-in-the-blanks-as-I-go format. However, the exams are quite tough and kinda sucked. Grading scheme is just like LS30A, but this is definitely a step higher in difficulty, so if you plan on taking this class be wary that it's not as much of a walk in the park like 30A. Homework is pretty mediocre, takes at most 1-2 hours if you know what you're doing, same textbook from 30A. Labs in my opinion are kind of useless and feel more of a separate thing. While they do cover the course content, it's mostly about coding functions for theoretical systems that you won't really see on your exams. There is a capstone project at the end for labs where you make your own system and explore it, so pick wisely who your group is going to be. It's also reliant on TAs and LAs to help you process what's going on in the labs.

I know I probably got a C for this class, but it's mainly because I got a C on the final and it's worth 60% of the grade because I did worse on the midterm.

TLDR class is okay, exams are not that okay so study for it, labs feel like they're kind of a waste of 2 hours of time.

The LS30 series in general just sucks, but Professor Bennoun is not bad. Weekly labs and homework assignments are do-able, although the coding can get pretty difficult sometimes. The midterm was fair, but that final...woah, it was crazy hard. The capstone project also seems oddly placed considering this is a math class, but it's easy enough. It really just depends who your group is, since the rubric is pretty specific. Would've much rather taken actual calc than whatever fake math this is. I actually started to dream about matrices at some point, 1/10 don't recommend.

The professor himself was good, he is understanding and is okay at explaining things. But the material just did not match what we saw during the midterm and final. No amount of preparation could allow someone to do good on these tests because of how poorly they are written, and the test are basically your whole grade. It was really unfair, and it you get to choose between the 30 series and 30A, take 30A to save your GPA.

Dr. Bennoun is an incredible lecturer. He explains concepts in a way that is so succinct, clear, and easy-to-follow despite the LS30 curriculum being a little wonky. His slides are very, very helpful since he has sample questions in between explaining concepts. He also genuinely cares for student learning, going out of his way to answer questions (Piazza is like an online forum where you can post questions/receive answers within 1 day usually).

I was ambivalent about the LS30 philosophy, but Dr. Bennoun explains it in a way that it actually makes sense without us needing to know complex proofs or theorems like in traditional math.

Tips:
- Take advantage of all of Dr. Bennoun's resources from problem-solving sessions to review sessions led by TAs before exams
- Definitely come to the last review session lecture, since it was very helpful for me to understand all of the content before the final.
- TAs are usually super willing to help during office hours if you have questions on the lab or homework. The labs in LS30B are significantly harder and take more time than LS30A, so don't leave them for the last moment...
- The class moves rather fast, keep up

Good luck!