mvandyke wrote a review of Mammut Smart Belay Device on February 1, 2010
My friend has this device and I tried it out last weekend. It takes a little getting used to at first, but isn't too difficult to figure out. After using his, I went and bought one for myself because it was so affordable! Rapelling can be a little hard to get used to, but it's great for belaying, especially if you're small (like me) and belaying much larger people.