Just watching flights the last few days. Yesterday, flight 868 did 2 air returns and a gate return before finally canceling for some kind of bleed issue. (yes, TWO air returns) Also, a flight to MCI had a pressurization leak and it had to be flown back to DEN at 8000 feet. I bet that was quite a flight... Flightaware

Not to mention I here there is a third bird that is "pretty broken" in the hangar at DEN. Not too good when your fleet only consists of 51 planes to begin with. Only furthers my belief Airbus sucks and the maintenance costs are biting F9 in the butt right now.