hmm - I didn't like it.
The first time I saw Cambridge, I was really "wowed", but then when I went for the open day it was all just a little... maybe even annoying? It just seemed like it was all set up and prepared for tourists, not students. I just couldn't live there - it felt like everything was in it's place, and you shouldn't do anything to distrupt it. I went into about 5/6 colleges, and they're were all the same. Don't stand on the grass, can't just hang out and sit on a bench (there weren't any!), and there seemed to be nowhere really to go.
It was all quite "bitty" with a college here, a college there, and no central point. Obviously, I was only there for a day, so I might have missed something, but for me it just didnt seem like the sort of place someone could live.