Solid, innovative, and a step in the right direction.
Ubisoft did a great job with rendering the graphics for each plane and the environment. There is a very expansive list of planes to choose from, along with a variety of weapons kits for each plane. The in-depth ranking system (which works in Campaign as well as Multiplayer) makes it enjoyable to keep playing to unlock new planes, weapons, skins, and maps. The multiplayer is very fast-paced and addictive to anyone who knows how to handle an aircraft and, therefore, may not be suitable for beginners. And to top everything off, Ubisoft introduced the revolutionary OFF flight mode, turning off the "limiters" in the aircraft and allowing them to perform maneuvers that would tear a real plane to pieces.
There are a few flaws in the realism. Many of the aircraft don't stall out when you hit the air brakes (when not in OFF mode) and the OFF mode is obviously unrealistic, however fun.
Overall, I think Tom Clancy's H.A.W.X. is a step in the right directions, accomplishing things that other American flight sims have only dreamed of. This game is definitely worth the money and I would recommend it to everyone to give it a shot.