Yes, it is a great sim! The flight dynamics are very realistic (except for the Bf-109, which I feel had a tendency to stall too much)...
But not only does it have very intelligent AI (a Bf-109 would fly twards a Spit in a straight line, but when you get on his six, he will start twisting and turning to shake you off, they would also fly into the clouds to loose you, or take you through a bomber formation so you can get shot up

...), the game also has massive formations of aircrafts, I did one with like 7 squadrons of spitfires, vs like 20 or 30 squadrons of He-111s...massively fun!

...only down side that I can think of is the rather boring scenery, poor visual damage, and if you crash into the ground (yes, you will die) but your aircraft will only loose a wing or so
