Haven't used the materials myself, but have looked at some of the samples. Looks reasonably good enough and does get good reviews.
I guess it all depends on what your starting point is. If you are a complete novice, or some of the more elaborate features of Media Studio are currently beyond your capability, then invest and give it it a go. On the other hand, if you are starting from a reasonable background in Video Editing and have a good concept of more advanced features, then the book probably won't add very much to your arsenal.
COMPAQ something or other with 500Gb Boot Disk, 1Tb external Firewire Disk, 4Gb Memory and a super duper sound card, 19" TFT Monitor etc etc etc
Sony TRV33e : Sony TRV310e : Canon XM2
Sony Vegas Studio editions to v11
Remember, there is always more to learn than there is to teach.