Well, it doesn't look like we're getting Dark Sun for 5e, but this setting is more than worthy to take its place. The "house rules" included make 5e a much grittier game and they're worth the price by themselves. I plan to use them with other 5e settings and in any homebrews I might run in the future. The races are all very cool, though I think the Incarnum aren't very suited to being a PC race. The changes to existing classes are all evocative of the setting, and it's a pretty cool setting. As for the book itself, the artwork is good and consistent in style - and it's a style I enjoy. There are a few tables throughout the book that are split between pages, which is not a great layout. Other than that, it looks good.
[5 of 5 Stars!]