I've used it for years and years now and find it easy to use however I can't help feeling that Airbus "re-invented the wheel" just for sake of it and to be different from Boeing. I can't actually think of anything it does better than a standard system but I can think of several gotchas and complications that arise because of the design. IMHO it's one of the weakest parts of the a/c and they would have been better off putting a standard system in.