It actually isn't awesome because the controls are purposely gimped for an obtuse level-up system, the levels are linear on-rails bullshit which share only a superficial resemblance to what Colors/Generations would do and it came out around the same time as Sonic '06 which just about anything would look half-way good compared to THAT. It's not the worst thing ever made, but it's an incredibly mediocre product which got a pass for the time for doing a few things better than even worse games in the franchise were doing.
Felt completely suckered into buying it after not touching a console Sonic game since Heroes was such a huge letdown as a 12 year old. Still, that 'storybook' team went on to make Colors, so they can obviously craft a great Sonic game when given the proper freedom, time and resources.