The 170E taught by the vice undergrad dept chair is definitely a unique experience to me. He skipped some material such as conditional pdf and expectations and said this will not cause any problem when we take 170S. He is a nice instructor who gave fair midterms and hard final(26-page long), and we indeed learn stuff from him. Unfortunately he does not teach the sequel. Not only I but also many of my friends began to miss him after finding those who actually give lectures for the sequel of 170E did a way less fantastic job than him.

Nice prof and person. He did skip some material I thought was very needed. Questions were tricky and wording is ambiguous, but he explains them

One of the Best Professor I had at Math Department :)
GOAT!!

Marcus gave clear lectures, and his midterm is fair. Sometimes he requires students to develop more profound understanding in some topics, which was reflected in the final that frustrated a great number of students. Overall 4/5.