these are pretty good all around. they feel more secure than the traditional design of petzl, yates, and camp. the trigger is very easy to operate with only one finger. the only drawback was that when you are getting started jumaring (bottom 15 feet of the rope) the bottom NForce cam needs to be manually operated by the trigger finger, this is because it grabs the rope so tightly. I never had that problem with the Petzl ascenders. Never the less, these in my opinion are much better than the Petzl.