User Review: Black Diamond ATC-Guide
Price Paid: retail
I have tried every belay device on the market that was designed to be used in an auto-block situation. The BD ATC-Guide is my go-to device. I use it exclusively when climbing for fun or when guiding.
The single connection point is easier to use and more stable than the B-52, and the thick aluminum lasts longer than the thin material of the Reverso. Petzl has improved on the design of the Reverso, but the BD ATC-Guide is still a better device. It can be used in low or high friction mode (something Petzl used in their update of the Reverso) and also as an ascender.