Great professor and someone you should take for a class like this. While homeworks could be a bit tricky, he offers to solve them in office hours. Notes do go by the book, but he usually provides alternative proofs to various theorems which helps with understanding. Exams were fair and he never tried to trick you. They were based off of in class examples and homework problems. I wish he were teaching 131B because he did a great teaching this course.

Prof.Yanez is an engaging, clear-minded professor. He gives pretty structured lectures along with detailed lecture notes that are ready for us to fill out during lectures. After every lecture, he gives out a sheet of suggested problems and picks two as homework problems. Sometimes those problems can be somewhat tricky, but he offers to solve them during office hours. For the exams, although there is no practice exam, he pretty much follows the examples he gives on the lecture notes and homework problems as well as discussion problems. You'll be fine as long as you understand the logic behind some of the key concepts and the necessary tricks needed to play around with them (he also offers tons of explanation of the tricks during OH). Granted, real analysis is considered to be one of the hardest topics in undergraduate math and 131A as one of the most challenging upper-div classes. Yet in general, I think he makes real analysis more approachable than I thought it would be, and his teachings underpin a key component of our learning of mathematics, which becomes a milestone to embark on for the rest of the journey.

Amazing professor! I'd take him for all of my math classes if I could.
-He explains things very well and is happy to clarify things in class. He is also always happy to help in office hours and very understanding.
-Has two grading schemes to help you succeed.
-If you understand the homework you should be well prepared for the exams
-He makes the class very interesting and engaging (I really loved the class and enjoyed the material because of how he taught it)
-Posts his class notes on canvas (attendance not required but I'd recommend)

Yanez is the best! Trust me! he is super fair and not mean at all. the first midterm is super easy, the second is little bit difficult but he gives everyone curve immediately making it no harm. he also offers a second scheme, so if you fail one midterm, it's really ok. He is very fair very very, very nice, he tries his best to help us and explains things clear, also sometimes he is funny

Exams: Very fair and reflect what has been taught. He gives plenty of practice problems.
HW: 6 Problems (4 of which are completeness and 2 are correctness).
Lecture: Engaging and compelling lecturer but sometimes you may have to ask for a clarification which he always kindly gives!
Hard class but made manageable!

Absolute GOAT. Tests and homeworks were very fair and reflected course material well. Had a very good way of intuitively explaining more complicated topics before giving formal proofs. Highly recommend this professor.