Some of his books are fantastic, others, not so good, IMHO.
The applied kinesiology thing; well Hawkins proposes it always works in his first book. And frankly, I think it may always work for him. In his second or third book, he corrects that stance, and says that the person doing the calibrating, and the person being calibrated both must have a vibratory level (not sure those are the right words -- it has been awhile since I read his books) over the 200 or positive threshhold for the results to be accurate. I just think that it is a tool that works for him, and iffy for anyone else. . . . so not so much a fan of it.
Hope that helps. Blessings from Belle