Up to 10K miles now, no issues yet with brakes, but I can see how they may wear faster on the R53 if you use the Intelligent Cruise control option. Generally speaking, braking while enabled is HEAVY, especially when it detects someone changing lanes (out), even though they're no longer directly in front. It essentially panic brakes, slamming everyone forward in their seats. I guess I'd rather have it do that than not, but definitely see how brakes could wear much faster with continued use. Definitely not looking forward to having to do brakes sooner.