Clarifications. (1) It's actually a hardcover. The amazon description says "Paperback: 1136 pages" but, as expected, it's a well-bound hardcover. (2) Another reviewer noted that the print is very light. In my copy, the print is just fine but I did notice that the pages are quite thin. They seem sturdy but are relatively transparent...I assume this is a simple tradeoff—they want to pack the 1100+ pages into a reasonable size and weight. Overall, it feels great to hold and flip through.
Observations. (1) It's in color! I wasn't expecting that but it makes sense given the addition of many more images, esp. on computer vision. (2) I skipped straight to Chapter 21 on Deep Learning, authored by Ian Goodfellow. Overall, they must have a great editor because the tone and style match well the "Russell/Norvig style" you might be used to from previous editions. I assume the other guest-written chapters are the same. (3) It's not cheap but I'd expect it to hold value for many years as it's unlikely to be updated for ~10 years and there will be significant demand for used copies if you decided to resell. (4) Minor point but I like the smell—it's definitely a real book!
Overall, if you are interested in AI and want the most comprehensive overview, buy now!
P.S. Well done adding Ada Lovelace to the already though-provoking cover.