Rowan's Battle of Britain (which is now BOB2 Wings of Victory) was a great game, but I find it to be quite unstable. Crashes a lot for me and I can't figure out why.

I love the game though. I still have my boxed version of the original release waaay back. If I could resolve the crashing (and I've tried!) I'd play a heck of a lot more of BOB2:WoV.
CloD is more stable actually (for me).