I got lucky and scored one of those "runs" to Las Vegas and actually had to go there for other reasons than getting wasted and lose money.
Anyhow, I had no problems what so ever with Spirit besides being late both ways. On the way back I was in brand spanking new plane. Never been in one like that before. New or reconditioned, but it looked super clean compared to usual AA. And on top of that I won 300 hundies and paid off my hotel bill at Hard Rock.