I got about 30k miles on mine and still very happy. I will be tearing the joints down soon for inspection and lube. I will report my finding with pics in my mc thread.
I replaced my rk arms that are bent for ground clearance with the metal cloak arms that are bent for tire clearance. I would take tire clearance over ground clearance any day, my mc arms just slide over anything. The mc arms also allow me to run 37x13.5 toyos with 17x9 4.5" backspace wheels with virtually no rubbing.These arms are intriguing ...any comments from users about the lower arms being straight vs high clearance bent?