bars mean shit... despite their advertisements of "fewest dropped calls" it doesn't beqar out in reality.
The ONLY people I ever talk to that have dropped calls are on Cingular. There have been several instances while mid-converstion with Cingular customers that I get a busy signal or sent to their voice-mail.
If you go to Vegas, good luck trying to carrying a conversation for more than 30 seconds on Cingular. (I have business to take care of in and around Vegas quite often.)
It may work for some, but ATT is consistently ranked the worst out of the top carriers in most big cities. Myself and just about everyone I know has had horrible experiences with them, and I truly think those that ARE happy don't use their phone enough for it to matter or haven't experienced anything different, so they think its fine.