Not the best,but defenitly NOT a 4.4
I don't need to explain what kinda game it is other than it's a Platformer/Adventure. So lets go through the biggest problems everyone seems to have with this game.
Control. Most people say it's stiff and unresponsive. I'll admit it takes some getting used to because its not as smooth as say Sonic Adventure but it still works just as good. The thing is it demands a bit more finesse.
One example. When Sonic does his homing attack, you have to manually point him in the right direction while in mid-air so that he hits the next target or else he'll just home-in in which ever way he's facing. You never had to do this before but it is functional.
Load times. They are in fact longer than they need to be, especially since it runs on a 360. However they never happen during anything important, so there really is no problem except that you will have to wait a bit.
Random Glitches. I only came across two. One is that Knuckles and Rouge sometimes get stuck on walls and it takes a few trys to get them down. The other one is Slowdown but only while walking around town (hub area) which, like the load times, are not really a problem since it never disrupts anything important.
Now what I personally did not like was playing as Silver. His gameplay and levels are very repetitive and quite boring. To make it worse his later levels are pretty long and unfortunately you have to finish his story (as well as the other two) to be able to play the final Level/Battle and get the true ending.
There are obviously other people out there that have beaten the game besides me but most just write it off as being awful and unplayable. All I can say is give it a chance.