I'll be completely honest. I went through this in about two hours, and I plan on returning it. It simply didn't have anything new for me. I was expecting it to be more along the lines of setting up a virtual network, attempting to hack the VMs, and then checking the procedures to see if you did it right.
Instead, this book covers things like how to install OSes into VMs, gives basic overviews of tools, etc. However, this is a great book if you're at the appropriate level for it. I think this makes a good follow-up to CompTIA's Security+ certification. It'll help novices get their feet wet with actual hands-on activities. I've done nearly everything in this book on my own, and that's really the only problem with it. While I didn't pay a great deal of attention to every bit of text, it seemed to be technically accurate and free from errors.
I wish I could give a more detailed review, but I thought I'd at least post this since no one has reviewed it yet. Just take your skill level into account when considering this title. If you want more advanced books, check out the Hacking Exposed series, Grey Hat Hacking, and the Penetration Tester's Open Source Toolkit.