http://reviews.cnet....ooie (Xbox 360)
Some quotes jump out:
"The House of the Dead tracks are delightfully creepy, and the races through the brightly colored world of Samba De Amigo are a trip, but it would have been more interesting to have a few more franchises thrown into the mix
"Your favorite character may not have made the cut, but All-Stars is a lot of fun even if you're stuck with Billy Hatcher."
And the one you'd been waiting for...
"A whopping seven of them have been pulled from the well-worn Sonic universe, though some of the lesser known entrants could have easily been scrapped to allow a few more franchises to share the limelight
. It makes sense that the lightning-fast blue hedgehog and his evil nemesis Dr. Eggman made the cut, but would anyone really have missed Amy or Big the Cat
I can't help but chuckle, and it does look like they made a very solid and fun game, despite any shortcomings that we could bring up. Notice that all-important word: SOLID. A game can be fun, but if it isn't solid, it won't be fun for very long. Good job, SUMO!
Edit: Looks like it's the same review as gamespot's. Sorry!