I've read the book fairly recently, and I have to say. Worth it 100%!
I've always had a love for the future, and particularly physics. Michio is the best author I have found (so far) on these topics. I own most of his books as a matter of fact.
Michio, though, never says anything is "impossible" in his book, he simply puts them into classes of IMPROBABILITY Class I being possible and close to reality, Class II being possible but not within out reach, and class III being impossible according to our CURRENT understanding of the universe, and if proven workable, would shake the foundations of modern physics.