First of all, this book is a beauty. Every page is interesting to look at (guitar tablature aside) as well as some cool included artwork.
the tabs are very well presented, and are easy to read (although, being able to play is a completely different story)
The DVD included, although minimal, is still neat, and hey, it's free, so who can complain?
I think the only complaint I have is that due to the thick cover, and thin pages, flipping through the book is slightly uncomfortable, as the back cover pops out, making it difficult to flip the pages.
But, aside from that, (which even then, it's really not that bad of a problem.) The Dethalbum tab book is very neat to look at, and a great tab book for any guitarist.
definitely recommended if you're a dethklok fan, and have some experience with a guitar.
beginner - you should be able to play the occasional riff, however there will probably be many that's out of your skill range. (but hey, what would be better to practice with?)
Intermediate - you should be able to play the majority of the rhythm parts, as well as the simpler portions of solos.
Skilled - if you can sweep at a fairly decent speed, I don't see why you wouldn't be able to play any portion of this book.