So I got SSR on a rental today. My two buddies didn't care for it much, but I kind of liked it. The moving back and forth felt great. However, I didn't like the feel of the jumping and dashing. Holding the button and releasing it felt a bit off and doing the dash attack on targeted enemies doesn't seem to work unless you have risen high enough in your jump. That being said, the graphics and presentation are really good, probably the best looking graphics I have seen on the Wii. I liked the music okay too, I don't know what everyone is complaining about.
I've never been a huge Sonic fan, but this is probably the 3D Sonic I have played.