So, I have now been using the PETZL NEOX for a couple of months and using it exclusively for all my indoor and outdoor lead belaying. I have been impressed at the handling capacity, it’s not going to work so well with your furry old, fat 10.5 climbing gym rope but for modern, thinner ropes it has been excellent. I use an 9.1mm rope for outdoor and a 10mm for indoors and they have both been fine (it is rated for rope diameters between 8.5 and 11mm). I feel that the NEOX may not a replacement..." go to full review