Well I was recommended by a good friend of mine to check out ratemyprofessor website and I used this when there were multiple classes offered by different professors to decide which would suit me best. Of course a lot of the bad ratings may come from those students that are e-raging but I found that some profs had hundreds of ratings so the average when compared with the 'measuring stick' school professor average was somewhat helpful. May be too late for that now for you but something to consider for the future.
My advice would be to take that site with a big grain of salt. Not only could students be e-raging on the site, but if you look at how ratings are set up, easiness = higher ratings. I think many of us here would agree that the ease of a class by no means = "better professor". I also have a big issue with the "hotness" rating on the site. I know they do it "just for fun" but there's something that really irks me when students are asked to rate scholars who have spent many years laboring in their respective fields on something like physical attractiveness.That said, I have used the site myself to research professors who I wanted to work under for my Phd program, and also colleagues of mine who teach a course I will be teaching soon. It gives me a glimpse of some potential issues, but no real certainty. I realize that unless we know more about the student giving a rating, that rating is really unreliable. There are many "slacker" students out there, and I'm sure many childish students as well. If a slacker student says a professor is "horrible!", what does tell us more about the professor or about the student giving the rating? Anyway, I have arrived at the conclusion that there is no way a professor can please everyone all the time.
