We flew with them on our first trip to WDW in 2001,exactly 1 month after 9/11. No problems that I can remember, flights on time, food - the usual airline fayre. Cabin crew - polite.
we have flown with them twice, first time we had four hour delay on way out and 24 hr delay on way back! didnt put us off so went with them again, no delays at all, going from gatwick next time but thats purely on price, the convenience of cardiff is great for us, nothing special about the planes, no seat back tvs unless you upgrade, quite cramped but its only a short part of our holiday, for convenience we would do it again, if price was right