What are your specs? X.P. users have more difficulties than most, and a modern graphics card with at least 1gb RAM is essential.
Even those with the best of rigs can have issues so there aren't immune to CTD's. I personally haven't had too many issues since the early days. If you buy it and you do have issues there is plenty of help available here if you need it.
Online flying is great fun if that's what you're into, and offline, I'd say without fear of contradiction that community made missions such as Heinkills are far superior to the ones that come with the game.
"Tiger got to hunt, bird got to fly; Man got to sit and wonder, 'Why, why, why?' Tiger got to sleep, bird got to land; Man got to tell himself he understand." - A calypso.
i5 2500K@4.5Ghz | MSI P67A-GD53 | 8G DDR3 Corsair@1600 | Gainward GLH 460x2 SLI oc | Seagate Barracuda 1TB HDD | Antec Truepower New 750W PSU | Win 7 64bit | Black Widow HOTAS | Freetrack 2.2/PS3 eyetoy