FSX Acceleration adds so many improvements and challenges to FSX, Its impossible not to enjoy it.
Pros: Adds 3 new aircraft, all of which (especially the FA-18D Hornet w/ a good carrier) are top notch in quality and fun, Adds around 30 SP missions and 20 MP missions (multilayer races), Multilayer races add allot more depth and fun into MP, DX10 and a partial SP2 improve framerates ALOT ALOT ALOT especially in citys, The intermediate SP missions are so difficult (when you use all realistic settings) compared to the original FSX missions. Dont even get me started on the adv expert onces...
Cons: Some weard glitch is making runways flash sometimes, not enough FA-18 missions, No cockpit hints in the FA18, Carrier can make your aircraft jerk a little, This doesn't affect the score, but I cant seem to find a working carrier in free flight, Another Naval jet such as a F-35C, F-14 or something would have been nice.
Well this thing is adds alot of fun and improvements for $30... including a boat load of extremely difficult challenges. If you like FSX just a little bit, and you like going fast, then you really need to pick this expansion pack up, consider it a must buy.