Spring 2018 - My favorite class with my favorite class at UCLA. Very applicable material to real life situations and super helpful knowledge to spill upon during interviews. The tests are difficult but not impossible and Professor Christou always curves VERY generously. Like the other person said, the workload is a bit heavy at times (1 hw due/week and sometimes a project update (coded in R) due) but its not unbearable and Professor Christou has always helped me through problems I don't understand during OH (which is has every single day and on weekends before exams - amazing). He doesn't really care about deadlines but rather puts a focus on students well being and understanding of the material. I appreciate this a lot.
Nicholas is a great teacher. He works very hard to prepare for class and to thoroughly present the material. His class is also a good mix of both theory and application. I actually generated a lot of R code that I will be able to reuse for other projects. Overall, I enjoyed Nicholas' class quite a bit.
Winter 2020 - His tests are super hard, the avg in my class was something like 32 out of 65 for both midterm and final. The professor himself is a very nice and helpful person. Just the class material and especially his tests are super hard. Have mental preparation of facing tough questions and challenges before taking this class. One last thing, learn how to do Latex on Overleaf before week 7 because his final project will be using latex.