Gave these a whirl at the weekend, really like the concept. I use a TrueNorth xl tarp, which can be a right bugger to get back into its own stuff sack. Made the whole process of packing it away a lot easier. Just gathered the tarp by its ridge line loops with the ridge line still in place, folded and rolled the tarp up to the ridge line and then slide the sack over the tarp (when rigging the line/tarp I had slide the sack over the ridge line in prep for the take down). Once the tarp was in I closed down the ends pulled the quick release on the ridge line and wrapped it around the tarp/stuff sack to act as compression, worked excellently! Kepis got these out to me very quickly as well, nice simple bit of kit!