Designing your very own airplane? Sounds good.
However, i always felt something missing in the game. Especially when you put all the things right on their way, a couple of weeks later, when your company starts to earn money, there is always some time left to spend and there was nothing else to do. After playing a while, as routine, arrange the flights and then hit the "call the day off" button.
Now this expansion or what so ever, just hits the target on the center, by offering you the option to design your plane, in your spare time mentioned above. It takes quite a time so, its a perfect fit for the game.
Its a superb fun to design your very own plane however, The worst thing about the game is, the designing section is (in my personal point of view) highly limited. You put the chasis, the nose, the tail, wings and then the engines and there it is your plane... It should have been a little more than that.
If it was a little more offering, this game would have been flawless.