Three important words: "read this book." Three much more important words: "Do the exercises." Some readers may have already encountered the main principles of this work, either in other books by RAW or by studying general-semantics; I still think it a valuable epitome of some very useful ideas. If nothing else, I think it would reduce the number of Internet arguments that start with "As you could plainly see if you had simply READ what I WROTE ..." which would certainly rank as an improvement in MY world.
I approach anything with "Quantum" in the title with a skeptical eye, as I feel the current fashion for explaining everything from ghosts to the impossibility of artificial intelligence by reference to quantum uncertainty, quantum coupling, etc., could use either a strong dose of real physics or just a good long rest. On the other hand, many people still live in the clockwork universe of Newton or even the commonsense world of Aristotle, years after the work of Einstein, Schroedinger, Heisenberg, Goedel, "etc.," revealed the cracks in the foundations of classical and naive physics and mathematics, so anything that raises awareness of these changes in the intellectual climate will have some good effects down the line.
I once referred to general-semantics as "21st Century Zen Epistemology," which might fit _Quantum Psychology_ as well. RAW has laid out a series of observations and a program of exercises that can, quite simply, make your mind work better, unless you are among the one in a scadzillion who has already completed the work.
Please don't fool yourself on this point! Read the book anyway.
Do the work. Do us all a favor, first of all yourself.