The main reason one would logically go into a coffee shop for is coffee, and in this department, Caribou Coffee certainly does not disappoint.
There are a variety of flavours to choose from, at a variety of temperatures, and a variety of strengths. You can even choose something that's not coffee (like a chai tea or hot chocolate or even a smoothie). Which pretty much means that there's something for just about everyone, and it all tastes pretty darn good, too. Everything I've tried hasn't been too strong, which makes it good for a casual coffee drinker. People who want something stronger can add extra expresso shots.
The environment is excellent, as well, making it both a good spot to study and a good spot to meet up with a group of friends.