I do - a few times a year. It's always been alright, particularly if you pay the extra for an assigned seat in the front row (you often get it to yourself, your locker space is usually reserved, and you get priority boarding - not that you need to be on early anyway).

They fly from an airport half an hour away (as opposed to an hour and a half) and I fly them when they take me to small regional airports I actually want to go to. And they're usually much more punctual. So I'll generally save 3-4 hours by flying them. Which makes it all worthwhile - even more so if you live away from London.

Very willing to accept that they are extremely poor in IRROPS, but then, I can tell you some pretty awful stories about BA, KLM and pretty much all of the US-based airlines in that regard!