Your linked reviews spend a considerable amount of energy complaining about the author's lack of pedigree, of one sort or another...or paraphrasing things the author didn't say. Which isn't really paraphrasing, is it?
I think I've been playing piano since I was 7 too. After years away, I've been helping to teach my son. Most of the advice in the basic practice section is really, really good. Many of the techniques describe correspond quite well to what my son's (quite excellent) teacher asks him to do...and they work.