i have used kleenwheels dustshields on multiple german vehicles over the last ten years or more, without a problem. under both enthusiastic street driving conditions and long nyc LI commutes, both stressful conditions.
theres a chance my rotors have lasted a bit less longer than others but that could be my style. either way its a small price to pay for the cleaner rims imho.
ps they are on my X for at least 7-8k miles, zero issues and look fine.