"Buy an XP" - Review of Black Diamond ATC-Sport Belay Device

The sport gets three stars from me because as a belay device it does, in fact, work quite well. But in the end, the sport is lighter and takes up less space, but not enough to outweigh the potential benefit of having an extra XP around to lend to a buddy, or to person X's significant other who loves accompanying to the crag but not enough to buy their own gear.
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