I had those on my C4S coupe and they will be going on my C4S cab in a few weeks. I really like these rims and I haven't had any problems with them yet.

 

I have ahd good results with them as well. They are easy to clean, provide great looks (especially with some brakes like the Turbos) and are durable. You cannot really go wrong with them unless you do not like the design IMHO.

 

HRE made the wheels to GT2 specs or as close as possible -- I'm an advocate of 18" wheels. I specified that I did not want a more aggressive fitment as far as offset. That is, while I prefer any wheel/tire combo on a car to fill up the wheel arch, those that stick out beyond the fenders are not my favorite. I thought Porsche got it just right with the GT2 wheel specs, which are approx. 16mm and 13mm more aggressive than the stock Turbo. HRE knew exactly how to build the wheels so as to accommodate the GT2's suspension, tires and PCCB's. Tire sizes are standard GT2 spec -- 235x40 front and 315x30 rear.

BTW, these wheels saved me 6 lbs per front corner and 9 lbs per rear corner of unsprung weight as compared to the standard GT2 factory wheels.