Mine works, but it's a heck of an effort. It packs down to something like a football size. I know other folks find it works really well though.Going to try the hammock tomorrow night. Jungle bag was bit cold last trip out in the bivi so got winter bag stuffed in the rucksack. It took bit of stuffing but doable. The compression sacks worth the money ? Saying that might just wrap in bivi and strap on outside maybe