The Metolius BRD Belay Rappel Device, there is no high friction mechanism like BD ATC-XP. However, the brake power is stronger than externals. The belay for a long time and the belay of a heavy climber can be eased. And, the descent can also operate the lip and it do smoothly. I like it very much.
I felt that the rope was not able to be sent off smoothly though I was using the rope of 10.5mm. I think that ATC-XP of BD can smoothly send off the rope.