As lovely as it is (and it's **** nice!) those wheels and tyres are going to give a very harsh ride. They look great, but the profile is so low on the tyres that there is hardly any air cushion, which means less flexibility and lots of bumps for the suspension to soak up.
It could do with something a bit better on the back under the bumper. A nice rear rear splitter that makes the car look different would have rounded it off nicely.