Meh...
There are some slight issues... but otherwise it's great.
There's no way to go back and forth between songs, so someone like me, who got lucky on song 4, can go back from song 5 and try again, and become more comfortable before moving on.
And the hidden cursor also is an issue. When I move the mouse side to side, there's always going to be some motion vertically, so I always wander off the top/bottom of the screen during a particularly difficult riff.
If those two issues were dealt with, this game would definitely rank a 5 and ten stars with me.