I'm a fan. They've got great customer service, great food, and free wireless. You can set up camp for 5 hours, and nobody will bother you a bit.
My favorite are location is the one off Providence, at that nightmare intersection of Providence and Providence and Queens and Queens. The staff is friendly, and the service is fast.
Right now, the roasted tomato panini is magical. There's a great tomato soup that is good with it as well. I think it's a little stupid that they give you a side of bread to go with your bread sandwiches, but that's ok. I spring for the apple when they remember to ask.
One of the most recent times I was there, the lady at the cash register gave me a cookie for free because it broke when she went to pick it up. That's the best...the cookie totally didn't taste broken at all! Hah!