It is the easiest self-locker I have used (that may be because it was the first as well). Feeding rope is not always easiest job but otherwise I love it. I have a couple climbing friends that are safe but not the safest, and this helps lock quicker. IT IS NOT IDIOT PROOF, I have heard of a person having the rope laced under the brake and when they tried to catch a fall the rope tightened on the device pulled the brake full open and the person dropped and extra 20 feet, no injuries just dirty underwear, but none-the-less not idiot proof. Make sure everyone knows how to use it before you go out.