Most Versatile

Most of the devices reviewed here are well-suited for single-pitch rock routes or gym climbing, but offer much less to multi-pitch or alpine climbers. Enter the Mammut Smart Alpine, which brings unprecedented versatility to an assisted-braking device. New for 2011, the Smart Alpine is a two-slot version of Mammut’s Smart device ($29.95). Two slots allow you to belay with double or twin ropes, and to accommodate such skinny ropes, the new Alpine version comes in two sizes. Two channels also means it can be used for double-rope rappels (or a doubled single rope), unlike any other device in this review. Mammut stresses you shouldn’t count on the assisted-braking effect as a rappel back-up, but in our limited tests, it did stop a climber who let go of the rope. The Smart Alpine also can be rigged in autoblock mode to belay one or two seconds directly off an anchor. Mammut suggests the Smart provides a more dynamic belay than other assisted-braking devices, which would be beneficial for trad and ice climbs, but the difference seemed marginal—the device locked up quickly and tight. While belaying leaders and seconds, we found the Smart feeds and takes in slack smoothly; it was slightly less smooth than other devices for rappels or lowering. But as one of the lightest devices in this review, at a modest price, and with all its benefits, this is an amazing tool.