Good for him, though I think he lacks the skills to be a top level HW especially with the Klitschkos around.
Arreola has a lot of power and a good chin, if he can just get his weight down he could be a real force.....
I hope Chris keep it up, of all the fighters out there he is the only one that I would like to see defeating a Klitschko (though I don't think he can pull the upset until maybe late 2013)