avoid him at all cost. if you like challenging, never mind.

Homeworks are not collected in his class. So if you are a lazy person hardly writes homeworks, like me, you will find the exams super difficult. His slides were not perfect, but his lectures were very helpful. I think he has a certain teaching ability and unique insights into mathematics.

Solid professor, not lifechanging.

Professor March cares and provides good material during lecture, though his slides occasionally had major typos (not equal instead of an equal sign). In office ours, he was very helpful. He provides proofs of most theorems and lemmas during class, but rarely provides examples similar to the homework/exams. I found it incredibly useful to attend discussion and TA office hours with a good TA to have exposure to the types of problems on quizzes and exams.

This class wasn't too terrible with open notes and 24 hour exams. Homework wasn't graded (hints were given but not full answers); two midterms and the final are each worth 30%, and there are ~5 quizzes for the last 10% of the grade.

He did seem to have a very generous curve; the median after the curve seemed to be an A-, if not A.

If you're new to proofs, do yourself a favor and don't take March. His lectures are dry and mostly consist of him reading pretyped notes. His notes are very handwavy as he skips steps in his examples. Exams are hard and he's not big on giving partial credit. If you try to answer exams the way he writes proofs in class, you will be marked down hard.
During our quarter, 25% of the class dropped by week 4, and 35% of the class dropped by week 10.