my initial reaction is *yawn*. not a whole lot there to make me want to run out and buy it. i find the greatest reason for buying the upgrades is so you can use more of the plane downloads that people have created. i wonder why they haven't included more 3D planes or a float plane or something like that. the harrier in the fourth one was a nice gimmick was but i'd like more options for something that i might end up flying in real life.