Hmmm.... I get a virtual receipt from Priceline.com and I print it out and present it at the airport check-in counter with my ID. I am issued boarding passes then and there. Couldn't be simpler.
Speaking of ATA, my company has been pushing me to take ATA when I go to corporate in Cincinnati (fly into Dayton). I've avoided it because, frankly, I don't know anything about the level of service, frequent flyer, etc.
Can you give me a thumbnail on ATA?