I have used 6 of these chains on a SRAM RED HRD Drivetrain. Love the master link and easy installation never a stiff link. Chain runs and shifts great.
I get about 1000 miles out of each chain. I weigh 177lbs and climb 10,000 to 12,500 weekly. I typically deep clean (citrus degreaser with a chain cleaner tool) 3 times per life of the chain.
Just what I had expected on my new S-Works Tarmac with SRAM Etap shifting, but pricey. I like the quick fastener, but Shimano has switched to them also. Anyway, I went back to Ultegra (for the much lower price) and noticed no difference in performance. Great shifting and longevity.