Definitely agree with that synopsis of the book, read it multiple times thinking each time I had missed something to apply. Went to one of Vigil's clinics and I found his presentation and slides to be helpful. He went in depth on his training philosophy particularly tapering (linear vs non- linear, volume, frequency, intensity, etc). He was also signing autographed copies so I picked one up.
He will be at North Central College, Naperville IL in June for a clinic with Christensen if you happen to live in the area. Clinic is sold out but I'm sure he would sell you his book. Definitely still worth having but for me, I would rank it below Daniel's Running Formula and Magness Science of Running.