Great kit, build quality is excellent!. I have about 1k mile on them and they ride pretty good but I do find the front springs to be a little soft for canyon carving. This maybe because my car is a competition model and the spring rates are just a bit stuffer than the standard M3. I will be purchasing the 62-160-009s 9kg and re-evaluating the riide. Overall they get 90% of 100%, just the softness of the front. I do recommend this kit.