IMO its mainly design choices as others have stated. The stainless rear bumper extensions and rockers on a wide body just look off to me, the headlights are too much bling, the center mount fuel tank is better suited for a more race inspired look, which this car is definitely not, I'm not a fan of the factory Porsche center hood vent molded into the ducktail, I don't like what's going on with the venting in the front bumper, (looks too aftermarket) rubber protection on the front and rear bumpers don't look right on a widebody (usually the widebodies had the simulated Black adhesive). Sunroof on a widebody backdate isn't right, but the most egregious is obviously the front flare placement. Having said all that, the rest of the work does seem to be well done, but I'm wondering why the flares were installed incorrectly to begin with.
Having said all that again.....Its looks to be a decent car and I think with a new set of front fenders, and the custom touches eliminated it would show nicely.