"Meh"
Not what I expected. If you are a fan of his other works it would be interesting to see how the seed of this work was sowed years ago and hear about how he wrote the others, but there't nothing new here and it plods along. The main thesis of his views on religion aren't even in the book, but in an appendix which is a reprint from an earlier work. Not worth the time, really. . .
"Couldn't finish it"
Loved "A Brief History of Time" but hated this. Maybe it's the addition of the co-author, but I found this too be condescending and arrogant. Where previously Hawking would give theories on what could be known and left to us what could not be (i.e. what happened before the big bang). Here he overreaches and denies our own individuality based on quantum physics and bluntly says if you disagree you are a superstitious relic. I tried, I really did, for 2 or 3 hours, but eventually had to give in.