Pros: If willing to work with Customer Service, can get good deals; cool phones
Cons: Poor service; many dropped calls; if not willing to pay for top-of-the-line phones, cheaper phones are of poor quality
Summary: I have been with Cingular/ATT for over 8 years, and since ATT took over, I have VERY poor reception, many dropped calls, and shoddy placement of calls. Changing one's location as little of 3 feet would cause the phone to go from full bars to no bars. I do like their customer service as they will work with you and throw 'extra's' your way, if asking politely.
Online billing is accurate, and simple to pay online, though I haven't done anything complicated like change credit cards.
Overall, cool phones, decent plans, but when it comes to the essential reason to have a phone - to communicate - ATT makes this PAINFUL!