Mag is a very versatile defender. I think he'll play a vital role for us, whether as a 25 min guy — or as a 15 min guy.
He also gets to the rim in a hurry as either a slasher or as a runner in transition. We really needed a guy like him on last years roster (Richie was the closest thing to him; Mag is clearly a bigger, more explosive guy than Richie, though).