He can fight, he's no gimme, pretty good pop, I'd call him a fringe contender. But I think he's a little slow for the ellite.
Brook is such a sharper, more accurate puncher that you have to imagine he's going to take this one unless he's dragged into some kind of suffocating war. I don't think Brook hits quite as hard as Tony Harrison at 154, but he puts them together better in combination and can throw from more angles...