Good game but a few minor problems...
The basic idea is that you fly a plane equipped with machine guns missles and occasionally bombs. There are 3 different difficulty settings (easy medium and hard) with the missions varying respectivly. No matter what setting you pick the first few missions are beatable without much frustration. But as the game progresses in medim and hard difficulties the missions become much harder and much more fun.
The missions themselves vary a lot, with some purely dogfights, some stealth and some a mixture of the two. All of the missions are fun and most are rewarding upon completion. With a wide variety of planes to fly and the ability to replay missions this game can keep you occupied for hours after completion.
The story itself is weak and predictible, but the gameplay makes up for it. So if your not fussed with the story and focus on the gameplay then this game is great.
One of the downsides of the game is the ground graphic and structures. While in the air the trees and buildings.look as they should but when you fly nearer to the ground the graphic look ugly at best as they are blockey and tiny (the planes you fly are larger than trees and building, MUCH larger). But this small issue does not steal anything from the fun factor of gameplay. I would definatley recommend.