I think it looks SICK. The side is kind of blah as the S-197 and '10 Mustang has been known for to me personally, and I'm apprehensive toward the rear since I think the '10's rear, although more interesting than the '05-'09, is too cheesy looking and executed kind of poorly.
All in all, I've always loved the S-197 GT500's, but this one looks awesome from these Pics IMO and 540 HP is simply beastly.