I'm not a fan of platformers and have never really liked the Sonics that I've played, with the exception of Sonic CD. I really only picked this game up because I'd read so many people say that it's an atrocious game.
I played through one path and saw the end credits. It didn't grab me enough to try to beat multiple paths (although I did start it again but it only kept my interest for the first few stages and stopped). I do like the idea of the Evil/Neutral/Good objectives on most of the stages. Other than some bad camera angles, I didn't see anything majorly wrong with the game. It was just rather blah.
I was ready to knock it down for unskippable cutscenes, but this is only the case the first time you play it as you can skip the ones you've encountered once you complete the game. A definite negative is that it only allows one save file on a memory card, so if, for example, you have a sibling and both of you want to have your own save file, each of you will have to have your own memory card.
Since it should only take a few hours, at most, to play through the six stages to complete a single path, to me it does make this game something that you could go back to every so often and knock out a path that you haven't done before. There's also the option to replay any single stage to try to get a better Grade or find the Keys that you are missing, which is a definite plus.
