Yes, I would recommend that even those that read the book still see the film with the understanding that they know what the man did in turning around his life in later years, because at least it will give them some sense of what he had to endure during the war.
The book does more than an adequate job of giving the readers a sense of what our soldiers endured. And Angela Jolie doesn't make money on her film if you don't pay to see it. My advice is to wait until it is on Netflix and in the meantime, read the book a second time.