First of all, I'm an experienced guitar player with over 30 years of acoustic and electric guitar playing experience. I just read through this book cover to cover and watched the videos in about 2 hours. I want to thank the author for writing this book and I hope he continues. While I did learn a few things, I think this book could be better.
Pros:
1) Good presentation of gear available outside of the normal Guitar Center chains. There are some key pieces of gear I may pick up after reading this.
2) The examples of pro rigs and interviews with system builders were interesting and informative.
3) Example setups and diagrams in the book were interesting.
Cons:
1) I realize that the author left out average street prices (probably on purpose), but I would have liked a comparison of quality vs. relative price (maybe that's best left for product reviews...) For example, it would have been useful to have a budget rig, mid-level rig, and high-end rig. A budget rig might come in around $500-$1000 dollars (like his simple rig in the video), the mid level might be $1500-$3000, etc. (I know I can't afford the rack he puts together in the video!)
2) The examples of pro rigs other than Alex's were sparse in my opinion. Alex Lifeson's rig was the most detailed and was interesting, but if you bought this book to see how John Petrucci gets his tone, you may be disappointed. There was a nice diagram for Alex Lifeson's signal path, but not for Petrucci or the others.
3) The videos were not very helpful other than a few of the things he forgot to mention in the book. His speaking style was slow and almost stuttering. His effects rack was fine, but I disliked how he went from "ok I need to wire this up" to "ok, it's done. Let's look at how neatly I tied up my wires." There was a lack of signal path explanation. I want to see what wire goes where and why. I want to see how you routed the stereo effects into the mixer.
4) Passing mention of 4/5 cable method without any demo or schematic. Lots of guys using the g-system use balanced cables and hum eliminators - I would have liked a demo of that. Not much mention of noise reduction methods either.
After digesting this book/video I find myself still hungry, but for the price it's still worth buying...