The first two Amped games were among my favorite games on the first Xbox. So I was really anticipating this game's release at first, then dreading it when I learned that the gameplay had been simplified a lot. Now that I've spent quite a few hours playing this game I can say that Amped 3 is clearly not as good as the first two games, but it's also not as bad as what I thought it would be. A mixed bag, with some huge mountains (but much slowdowns), great humor (at least if you are into that kind of completely stupid stuff) and a not so deep gameplay.
Update : Second part online.