I played it shortly...I liked it.
I've played the Sonic on Xbox 360 at Best Buy a few times...it really did suck. A lot of it looked really good, but it felt kinda slow and I died 3 times by falling in a bottomless pit, cause I couldn't see where I was going...it sucked. Some 10-12 year old kids played it after me, and they sounded like they were having fun, but they died so many times, and they just gave up.
The Secret Rings game was pretty fun, mainly because I wasn't dying all the time, and it felt a lot faster once I got the hang of it. It looked quite good for a Wii game too. I wish I could have played it a little longer.