By far the hardest working caving harness on the market. The low attachment point means that you've got maximum grab on each step up when climbing ropes with a Petzl Croll. This doesn't sound like much for a 10m pitch, but after a 100m you're going to be glad you're not losing 5cm each time. With the buckles on the inside of the leg you're golden on tight squeezes and can wiggle without worrying about snagging your harness. The only thing to think of is backing up the gear loop, mine wear out after a season or two, and if you drop your gear in the cave you're done for. Other than that, this is the best caving harness I've ever tried on.
Low attachment point gives you the most rang of movement. The is very comfortable for a non-padded harness. It packs well into most traditional cave packs and isn't very heavy. I've been using this harness for 3 years, and when I replace it I plan on getting a new fractio. Trust Petzl for caving gear.