I have shot blazers for 2+ years both on my switchback xt and my new 82nd with the Q.A.D. rest and have not had any problems. That being said, a freind of mine just got an 101st and put his Q.A.D. on after two years of use, and it lock up and wouldn't drop.My bow guy at Oak Hill Archery said that in his experience these rest normally have no issues but has seen a few lock up too! Just my two cents.