I've removed all incriminating information...
"I just wanted to put in a good word for Prof XXX. I took XXX class with him last fall and I absolutely loved it. And I think he is fantastic. He's one of my favorites here."
"I really liked XXX class, and I really liked Prof XXX, but he is very esoteric and many students find it difficult to follow him. I think my interest in the substantive law made it easier for me to follow him."
"XXX class with Prof XXX is similar to having your toenails pulled out with tweezers. He is all over the place, and you basically have to teach yourself. I did not have a good experience with him."