These have added .6oz to my setup. Now i have my slings attached to my huggers, i just wrap the hugger around the tree and clip it onto itself with a dutch biner. The same as someone with webbing only would do. It's so easy.
I used to wrap the hugger around the tree, put the hugger through itself and finally attach my sling via nacrabiner. This needed to be done on both sides. Now i just clip one side, then clip the other. Makes my hammock setup time almost instantaneous, at the cost of about .6oz.
For me this is soooo worth it. When i get to camp im tired, i don't feel like spending 20 minutes setting up my rig. Nacras are great and i use them for lots of applications. However, at the end of the day, the easier the better-as long as the weight added is not significant-in my opinion.