I bought it because I could get a $10 controller, as I don't care much for metal. I've gotten a little over half the songs done. I'm surprised they have it set up the way they do, as you can unlock every song by beating like 5 songs.

No particularly difficult songs yet. "One" is a lot easier than it was in 3. I'm sure the Slayer song will get me some. Only played three songs online, but the online doesn't seem much different than the regular game (i.e. the people who are better than me don't play!).

I'm playing GH right now better than I ever have, though, so I don't think any song would seem difficult at this point.