Beats the hell out of the GBA port of Sonic 1. Example, this one is playable. They should have used oldskool early 90s Sonic on the cover, it would have sold more that way.
I had actually gotten Sonic and Knuckles right when it was released. It wasn't until like 5 years ago that I'd even gotten Sonic 3. That game is so awesome... I'm going to play it again sometime next ...