It's fantastic!
I love scrappy looks, but when I do them myself, I always second-guess. I recently started a scrappy star quilt for DD with fabrics that were originally for a different pattern. I just wasn't sure I liked it at all. When I showed her what I had started, she just loved it. That made me start liking it more and more. Now I'm not sure I'm going to want to give it away LOL. Your son's going to treasure it!