I would 10000000% recommend Jukka!! The class is insanely easy because he is an excellent teacher! The content is very easy and he is extremely concerned about student learning. You will learn a lot from this class. The coding portion isn't that bad, so don't be too scared. You get plenty of practice problems before exams which allows you to prepare yourself. There are hardly any curveballs in the class. He truly tests you on content that has been covered. Overall, take this class with Jukka if you can!!!
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If you have to take 30B, take Jukka. Although he assigns a lot of work, I found that his active learning activities helped me engage with the class material. Jukka gives weekly quizzes but you get two attempts. He goes over the questions and answers the day it is due. It is very clear that he cares about his students and is very passionate about his job. He held many review sessions before the midterm and the final, which was basically going over which types of questions would be on the tests. He offers many extra credit opportunities. Overall, this has been my favorite professor so far at UCLA!!

If you are in the Life Science 30 series, taking Jukka is a must. He is probably the most fun, engaging, and interesting professor I have had at UCLA, and college in general (I went to FSU too). Jukka really cares about the student's success, as he posts his near daily office hours meetings, lectures, and related course materials. Every night, you could expect an email from Jukka detailing the roadmap for the week and upcoming assignments that must be completed. He has two separate grading schemes, of which the one that is chosen is the one that will give you the highest grade in the class. Now, there is a lot of work to do in his class, as every week you can expect three post class activities, post class reflections, pre-class activities, and pre-class reflections, followed with a weekly homework that is fairly time consuming, and a lab that involves coding. If you take the time to complete these, which are tedious (even Jukka says this), it will help you absorb the materials even better, making the midterm and final much more manageable. Additionally, 5 minutes before our final exam, Jukka walks in the room, states that this will be a walk in the park and that we should thank him, and proceeds to leave. Although it wasn't, I still appreciated the reassurance. Overall, take Jukka, he's the best.

No because the way before I took this class I thought the reviews were weirdly obsessed with Jukka but GUYS I'm telling you he's such a good professor. This class is so so manageable to get an A in, he explains everything so well and so thoroughly that the only way you don't get one is if you slack off (like me..). Anyways! I will say there is a lot of busy work and you probably will forget an assignment here and there because of how much there is—3 classes a week, and per class, there's a pre-class activity, pre-class reflection, and post-class reflection. Luckily each one is worth so little of your grade and you can have late submissions. If there's one thing I can recommend DO THE PRE-CLASS ACTIVITIES. It's not like LS 7 where the readings and Achieve is so annoying—no these are actually pretty short and so so helpful, so take the time to do it. It makes lecture so much easier. Each lecture was only 50 minutes for us but somehow he covered a substantial amount of material each class without it ever feeling like too much or overwhelming. I also sobbed in a bush for 3 hours after the final because I studied the entire quarter's worth of material the week before finals and didn't have enough time to review everything, but I still somehow ended up with an A- because he grades super generously. Plus the capstone project is literally worth free points it's so easy. I also loved my TA Lucy she was the best. This class is a slay and you should take it with Jukka 100%

If you are a life science student stuck in the 30 series, take Jukka's class. He is the best. The class is challenging, but he provides excellent lecture materials and is engaging (and often funny). His assignments and homework are clearly related to the topics we're learning and are excellent prep for exams. He also has many extra office hours, where he goes over homework problems and weekly quiz answers, and review sessions for the midterm and the final. He was one of my best teachers at this school.