I have a Kifaru 5 string compression sack. I like the fact that you do not end up with a round ball in your pack. The sack compresses around the diameter of the sack instead of from end to end. The only thing I do not like is that the sack is not water proof like a event sack.
kifaru stuff sacks are nice for the shape they end up, i hate the bowling ball shape you get with others. dont believe the web site though when it says pull as hard as you want on those strings.ive broke two, i am wicked buff though. im also going to pick up a z packs one to try out this year. ive heard good things about them.
yeah the first time i did it they sent me a new one. the second time i broke one i just tied some new cord in place of the one i broke. they use shock cord,if they could use true 550 cord it would be bomb proof. but i imagine those little line clamps (or what ever the right name for them is) dont come that small, so i keep some extra shock cord around for the next time i break one.no big, i know how to tie a knot