Yeah, I didn't see Scott Pilgrim in the cinema either (mostly because I found the trailer really off-putting). I was completely underwhelmed when I finally saw it on DVD, so I'm glad I didn't waste my money.
Scott Pilgrim had a lot of interesting and experimental stuff in it (a lot like the game Mirror's Edge) and I'm glad I've seen it just for that. But I'm not going to watch it again.
Sometimes experiments just don't really work!