If you can overlook the characters' overly modern mindsets, behavior, and manner of speaking and thinking, World is definitely entertaining: a fast-paced, tension-filled novel with an epic sweep. I'd recommend it ... unless the historical issues would prevent you from suspending disbelief for the full 1,000 pages! A novel that size might really make a dent in your wall.
That's the thing, what works for one reader isn't always going to work for another, and why it's good to point out what didn't work in a review. There is a HUGE kerfuffle over at Goodreads right now over a very well written critical review and an author's agent who got a wee bit carried away at Twitter.