I replied to someone else earlier and the only thing I might add is that I guess AirTran isn't as well known up north as it is here in Atlanta because alot of the people here prefer AirTran because it is cheaper and more reliable. I have been on several AirTran flights that have had Delta passangers who had been bumped, delayed, or otherwise inconvenced and needless to say they were not happy Delta ticket holders!
We use AirTran about 8-10 times a year to fly out of Atlanta. They are good, reliable and cheap if you watch for their deals. We have family scattered throughout the SE and can usually get fares around $100 roundtrip (we travel to several cities in Fla during "off peak" times and sometimes peak times) and there are excellent deals from Atlanta to the NE as well although I personally don't get up to New York etc. very often anymore.
I flew AirTran on 9/14 on one of the 1st flights out of Hartsfield when they allowed airplanes back in the sky and they were nothing short of fabulous since we were all a bit nervous..........
It is pretty much no frills, I am not even sure they serve hard liquor (I know they serve beer and wine) and they don't do meals as far as I know but for the $$$$$ you cannot beat it!
And they pretty much stick to the schedule.......unlike Delta who cannot seem to ever get to and from places on time!