Gieseker was not a bad professor, but not a great one either. The material was taught in a semi-straightforward (if boring) way. The midterm and final mirrored the homework material and the stuff we learned in class well (no surprises). My TA was incredible and basically made the class easy (Duncan). He is accessible, there was a grading mistake on one of my tests and he quickly corrected it. There's a little confusion on whether your homework counts towards the final grade, during my class, it didn't, but it was still helpful for the tests. If you have to take Math 61, your experience will be fine with this guy

Professor Gieseker's lectures aren't lucid, however he is very kind and answers any questions you have. I enjoyed 110AH with him.

A really nice guy with a sense of humor. But at the same time, frankly, I learned nothing from him.