If you've been dabbling with the Paleo/Primal diet, like me, then you probably know that all its proponents have a slightly different take on things -- and while most are in agreement on the major points, each tend to emphasize on certain things. We, the converts, are all guinea pigs in a sense, trying things in different measure to see what works best for us as individuals. I can relate to many others who have commented about this online. I was extremely happy with the results of going "Primal" with Mark Sisson, and still follow his book-advice and blog fervently. However, I went a little off-track while experimenting with the idea of ramping up my metabolism. I was eating the right kinds of food (in high quantity), avoiding the toxic things, but my hunger and satiety got way out-of-wack. The PHD gave me the info I needed to make some adjustments (safe starches being the main addition) and I have been quite impressed with the results (which are apparent, despite already being in rather good condition). This work gave me the impetus to make a few tweaks, which was exactly what I needed to get back in my well-being sweet spot. Outside of that, it is a fantastic resource for understanding how our digestive system and metabolism function. It's detailed, but not so complicated that a lay person can't follow. It does a wonderful job of adding to the scientific foundations of this burgeoning movement's hypotheses. I think the collection of evidence presented here not only stands on its own, but should help get the movement up and running -- at least until the actual health/nutrition research catches up to the theory. Overall, the PHD definitely stands on its own and might be the best and most thorough introduction to Paleo diet on the market. But it is also a great adjunct to the growing Paleo literature and should help to "fill in the blanks" for many of its experimenting adherents.