Pros: Good customer service, willing to work with you and go out of their way to help, even throw in some extras to keep you happy. Phone gets great reception and very few dropped calls. I get a free phone every two years, my Motorola Razr was free.
Cons: None.
Summary: I love everything about AT&T, I have no complains at all. I have been with AT&T since before they became Cingular and now they are back to being AT&T again and customer service has always been GREAT -- they always answered my questions patiently and politely, resolved every problem (although my problems have been very few and far between). The phones are great, the reception is better than my friends who have Verizon and Sprint. I rarely get a dropped call, and I commute from New Jersey to New York every day, no problem with reception in the tunnel or anywhere else in the city. Even on my vacation in the Catskills where everyone else had no reception whatsoever (yes and that includes Verizon), I had no problems at all, in fact I was the only one using my cell phone. Needless to say, I will stay with AT&T for a very long time, and I even got my friends to switch. So far, none of them have any complaints either!