I hunted with the Cat III this year and was very impressed with the amount of gear I could carry and the comfort on allday hunts where I would travel 5-10KM. I'm actually shorter than JDS3 but still find this a very comfortable system. If you look at the two straps on the above picture, I would carry externally my tripod and ground blind, inside I carried my video camera, 2-3 bottles of water, 2-3 sandwiches, first aid kit, folding saw, knife, extra shooting glove, calls, extra compass, matches, tags, etc... Some days I bet I carried a 25-30 pound pack. I like the way the pack stays behind you and below your head. Never lost any arrows, and I like the way it keeps my fletches dry and out of sight as my feathers are bright yellow.