It maybe a good game to Playstaiton fans, but not for other fans says "Not really".
The Gameplay is fun, but not too fun if you know how the game goes if you play old sonic games. The camera people say has problem and I can see that, and I understand sometimes...then the graphics looks okay, but if you compare to others like Xbox and Gamecube, it's best graphic than this, but for me, I don't really care much of them. The sound is good, but the only thing that I was concern is using Homing attack sound, if you compare to others you can hear them, and you can hear them if you play multi-player. Then the voices are incrediable, and I thought they did awesome job, but later in the game 4kids dubbed other games later, and I really miss them. Good story, and each stage has different things as you play the game, and each end they tell you what to do, and I did finish all of that game. The value is not so great, but it's still okay.
So, overall, it's a good game, if you like Sonic to you all Playstation 2 and like the old games, then I would recommend play that game. So, that's all of my review. Since I'm the expert of the game, if you got any question of help of that game, contact me by PM me. That'll be all!