I think it looks great! Although, more and more 997's are popping up with the TT wheels it seems. When I was at Porsche Stuttgart this past fall, lots of the non-TT 997's were sitting around wearing the TT wheels.

 

I think they are the best factory wheels by far. 1 piece factory forged wheels are not something to ignor. I think they look very nice on my C4s. I liked them enough that I paid a premium and bought the first set wheel enhancement had before the 997tt was even available in America.