I was getting ready for a three-week vacation in Montana, including several days backpacking in The Bob. My Son-in-Law suggested I read Ray Jardine's stuff. I did some searching for "ultra-light" and HammockForums turned up as one of the hits. I started reading some of the posts and decided to give it a try. Getting off the ground sounded like a Great Idea. (My bones are 59 years old.) I snagged a Hennessy Exped Asym plus a Hennessy UQ on sale, slightly used, ultra cheap. Hung out at home on the front porch.
Loved it, slept warm and dry, all the way down to 11* F..
Slept warm and dry in rain and wind at 15 to 35 MPH, temp about 35* to 40* F..
Took it to Montana, hung in several locations for most of three weeks, including several days in The Bob. Loved it.
Hammocks? Best camping ever. Best sleep of any kind, in any place, ever.