Dave Jacobywrote a review of Mammut Smart Alpine Belay Device - 8.9mm-10.5mm on July 7, 2011
super versatile, belays, rappells, autoblocks great. Cant find a compromise. Thought I'd use it for trad and alpine but use it in the gym and at the crags to. once you get used to it you can pay out rope fast without snagging by positioning the nose upward. Catches really well and locks down on the rope. Very safe device. Previous review complained about it being too wide to clip a locking biner into it. Can't figure out what they mean, I use a Petzl Attache and its great.