We flew Air Tran for the first time last month.
It was really great being able to print the boarding passes from home. We just went straight to security with our carry-on luggage and boarding passes and then right on the plane. No stopping! Very easy and fast.
Coming home we were delayed about an hour. Our plane to Philadelphia came in and everything looked OK until shortly before we were due to board. They announced that the flight crew for our plane were due to land in Orlando around the same time we were to depart. Made no sense to me unless they were delayed. Anyway, it took about an hour + for us to finally take off. They boarded us quickly when the crew arrived, but there was problem with the paper work and that took a long time.
By the way, although we could not print out boarding passes for our return trip we did pick our seats on-line and went to the ticket booth for the boarding passes.
Overall, the service was pretty good and the prices were very good.
I would certainly use them again.