I don't know if I've ever read a John Grisham novel before, and this was pretty much what I expected. Entertaining, fairly fast-moving, shallow plot and characters. I didn't mind read it, I wouldn't avoid John Grisham novels in the future, but I won't seek them out either.
(Some sloppy editing in a couple of places, though, when a secondary character was referred to by the main character's name.)
I'm sure he'll keep churning them out (not at the rate of a James Patterson, though), and I didn't mind reading it. But I don't expect it to stick in my brain for any length of time.