Ive had the later Varient (black body) RS spec fitted to my 9 for about 20,000. Bought them off a friend who had done about the same. Only trouble theyv gave me is i had to replace both rear dampers as they leaked and started to knock (£170 each) Dont think thats too bad after 40,000 miles on uk roads.
Using 12k front 10k rear so they are a bit stiff for mainly road use.
Probably wouldnt choose them again over meister r if i was buying new though.