Really fun! It's walkable, but has a lot to do. Lots of cultural activities as well as bars. Everyone comes out for the football games and tailgates in the front yards of the houses students live in near to campus.
Plus, Michigan has some great places to explore if you like the outdoors, and it's easy to get to good campsites and hiking if you have a car.
If you're a chick-flick fan, the Five Year Engagement was filmed there and features some really good shots of the town and its city life.