I have Gilles rearsets fitted to my S4 and the quality is superb. I bought them off ebay and paid a good price.
They are in black and compliment the black frame. they are fully adjustable BUT! if you have the bellypan fitted like me you MAY! have difficulty setting them at the lowest position as the gear change bar MAY! catch the bellypan.
I have them quite high and did notice the difference instantly, but have got used to the position now. :razz:
Having only ridden approx 200 miles though the carbon heel plates that come with them have developed a few scratches, with my boots rubbing against them.
They can be replaced however seperately to get them looking A1.
They come with the rear brakelight switch bracket for easy attachment of the brakelight switch and fitment was fairly simple.
:-D
All i can say if your in the market for a set of rearsets then definitely have Gilles on your list! the looks are great, the quality is excellent, fitment easy, and comments from friends once you have them fitted is always complimentary.
One final thing is the price may put you off but, i think they're worth every penny.