Used this trad climbing, aid climbing, sport climbing. Winter is just starting so have yet to judge it in that discipline or in the alpine. The harness is surprisingly comfortable for its size. The main issue is that it tends to bunch up and fold over in places where you want surface area for padding, because the mesh it's made out of has no rigidity. One point where this could have been designed better is in the front belay loops, which each have two attachment points at either end of the belay loop. The front of each belay loop is attached to the top margin of the harness. The back of the belay loop is attached to the bottom margin. If too much gear is placed on the loop it causes squeezes the two margins together and causes the mesh to bunch up. Seems like they could have avoided this by simply attaching the loop to the bottom margin at both ends.Not perfect, but will definitely see use in alpine and ski mountaineering applications going forwards.