Is this game bad or good.. tough question, but i think this is a good answer!
You can't call this a Sonic game since the main character of this game is Shadow thus the name of the game Shadow the hedgehog.
It does suffer from some flaws but it's easy to oversee them.
One of the major bummer about this game is that the voices from the 4kids Sonic X was using their voices for this game..
I'd love to play this game with the original japanese actors.
It's easy to control Shadow, not so much to complain there..
Another thing is that it's hard to choose if you want to be a bad guy or a good guy.. or just a guy who cares about himself.
The graphics are not that bad as i thought it was going to be.
Sega could had included a multi-player mode where you could battle your friends in a 4-player battle that'd been awesome.
I liked this game although it suffered from some minor flaws.
If you are still unsure if you're going to buy this or not.. then i may say
loan it first from someone who has the game cause when it comes to this game many seem to just plain hate it and other loves it..