The songs in this pack, with the exception of MAYBE "And Justice For All" are pretty damn hard on any instrument you play on. "Blackened" and "Ride the Lightning" are both very difficult on drums, and all three are quite a challenge on guitar. Still, for 440 MSP you're getting your moneys worth. The songs are all quite long, and they're all fun to play.
...And Justice For All: 5/5 Awesome song - it's really long too. A lot of fun on guitar and drums.
Blackened: 4.25/5 I can't beat this song on expert drums and it's the only song in Rock Band I haven't 5*ed yet on expert guitar. It's a good song, but the worst of the three.
Ride the Lightning: 4.5/5 I can't beat this song on expert drums either, although I haven't tried in awhile - the main section is pretty difficult.
[All of these songs are master tracks.]