The site has built-in biases:
1. Bad ratings must be substantiated with examples or they get thrown out, whereas good ones never need supporting evidence. Double standards?
I know of teachers that regularly work on getting their bad reviews removed, AND some that write fake student reviews for themselves.
2. Comments about preferential treatment get thrown out. I feel that as long as I tell the truth, it should not be censored.
3. Very limited word count (max 350 characters). You can't even finish a proper story.
Other than these, I found the general depictions of professors quite spot on.