I was a subject in the research that went into the writing of this book, having become involved a few months before the book was written. Dr. McGee and Rodger helped many people with a wide variety of health problems with no downside and some amazing results with everything from old unhealed wounds to heart problems to cancer. Personally, I believe it helped me get through a nasty cancer, although I also did conventional chemo. I began using this after I was almost finished with chemo, and was on the brink of having to take a break in treatments because my white count had fallen so low. However, using the protocol, it went back up to normal in time to get the next treatment. Dr. McGee goes to the source to figure out, as best he can, how things work (e.g., he describes actually going to France to talk with Nogier about how he developed his light frequencies to promote healing of various body systems; and he didn't just accept Rodger's evaluation of what was effective, but had a well-trained Qigong master check the energies coming from the various modalities, and make suggestions about how to maximize their use together.)
We are so used to thinking in terms of magic bullets to cure disease that it's difficult to even imagine an approach that treats the whole system, simply, and without doing any harm to any part of it -- unlike our pharmaceutical "solutions" that often have serious side effects. We are, in fact, so accepting of the fact that cancer treatments damage healthy cells almost as much as cancer cells, it is almost as if we can't believe that a treatment can possibly be effective if it doesn't also make us suffer.
Despite the seeming odd approach used here, there appears to be a good theoretical foundation in quantum theory about why the protocol works. But whether we understand why or not, observation is that it works. It surely would be wonderful if there were huge controlled studies to "prove" it's effectiveness. But huge controlled studies are costly, and since there is nothing to sell here except a one-time small investment in tools that last for years (sold by various vendors with no one making a lot of money), there is no money to pay for huge controlled studies. Thus, they'll most likely never be done.
Personally, that's not going to keep me from using something that doesn't hurt me and is probably saving my life. From what I've been reading, there is growing evidence that cancer has stem cells, and unless we figure out how to kill the stem cells, it is likely to recur at some point no matter how good our initial response to treatment. This protocol does not appear to kill the stem cells, either. If one stops using it, the cancer can eventually recur. But using it for maintenance involves a couple of hours once a week or so. Not a big sacrifice for many more years of good quality of life. And a heck of a lot less expensive and destructive than long-term "maintenance" drugs.