Ever bought (or not bought) a game because of a demo?

[Moren]

Ughhh... you brought me back bad memories.
I think the only time was when I was casually in a Wal-Mart, I saw Sonic Rider's for GC, and really enjoyed the demo, it was fun, fast paced and the gameplay was good. So I got it.
What a piece of crap, the modes were terrible and the game got old very quickly.