<p>Ignore the reviews where the students complain about having to be there or actually read the book! Actually I think they’re pretty accurate as long as there are reviews from lots of different classes. I have noticed, especially with math teachers (may just be because that’s what D is looking at) that sometimes professors get low ratings in the introductory level classes but high marks for upper level class. So usually a smart professor who just doesn’t do well with beginners. If possible, look for reviews of the specific classes you are actually interested in, not all the classes he/she teaches.</p>