I booked a flight online, received a confirmation code and used it to go onto Delta's site to successfully choose my seats. Then I received a call from Cheapbest saying I wouldn't be allowed to board if I didn't pay twice as much as I was paying. They said it wasn't confirmed (I had a Delta confirmation number and Delta they let me choose seats on their site). I asked what a confirmation number meant and they said it was a "dummy confirmation". I was the dummy to trust them. I spoke with several "supervisors" and got the same story. I wouldn't pay the additional amount and they cancelled the ticket. They said the price that I purchased was a "glitch". The old bait and switch and outright fraud. Stay clear of them. I'm filing a complaint with the attorney general's office, Delta Airlines, and anyone else I can find.