Short Attention Span Review: "Guitar Hero World Tour"

So, yesterday I got my copy of Guitar Hero World Tour for the Wii. Right now, I've only got the guitar controller, so I haven't tried playing with anything else. Based on my first impressions of playing through the starting songs: Dude, this is more fun and challenging on Medium than Rock Band. Plus, I like the selection of music a lot more. They're not all gems (I'm looking at YOU, Paramore) but there's a lot of good material that I like.