Eddy wrote a review of Petzl Reverso 3 Belay and Rappel Device - 2011 on November 20, 2008
As smooth with a 9mm or a 10.2mm rope. This is no different to many other belay devices until you hang it from the big loop to belay your partner up. I no longer get a freaked out second when he/she sees me belaying with an italian hitch - there goes my fun. A further advantage is the autolock feature when belaying a second from an anchor (the live rope runs over the dead rope so that a fall results in the latter being pinched into the belay device effectively causing a self-arrest)A nice piece of equipment but maybe runs a bit smooth for a beginner. A standard ATC has more friction and may be easier to control when belaying or rappelling.