Paul Mourer wrote a review of Petzl Reverso 4 Belay and Rappel Device on February 10, 2013
Familiarity: I've put it through the wringer
I have friends who have both this and the BD guide device. After bouncing back and forth forever about what to buy for myself, I opted for petzl for a couple reasons: the wider opening for lowering ( which the newest BD now has), the orientation of the guide ring, its pretty light, and hey its petzl and its expensive and i dont own anything petzl. A deal came up and i sprang for it. Have used it for about 10 days in red rocks for multipitch climbing in addition to some light use for cragging and i'm hesitant to say i hate it, but i see no advantages to it. it's lighter -- by how much honestly? and in comparison to the 10 cams, lunch and water etc im carrying i dont think i notice. Also, the tubes on this thing are unbelievably narrow. I was stuck cranking a 9.8 petzl and 10.2 glider through this thing and even the 9.8 was horrific. I would not reccomend using anything other than half/twin ropes with this device for guide mode. gym ropes are next to impossible. Also, there isn't much wear yet, although a lot more than i expected; but the wear that is forming is clearly going to form some real sharp edges -- something i've noticed black diamond devices don't seem to develop.