Rating: 4 / 5
The Hennessy was my starter hammock. I had an Ultralight Backpacker Asym.
I used the HH for a year, and have to say that it completely re-organized my priorities for backpacking. I hated tents; claustrophobic reactions to mummy bags and waking to find myself in an opaque dome I couldn't stand up in following a night of tossing and turning and hardly sleeping, well - the hammock was a godsend. Sleeping (not tossing and turning, but comfortable, blissful sleep) was the biggest factor in whether I enjoyed my outing.
The issues others have had - the figure 8 lashing, the lack of storage space - plus my own gripes of always sticking to the velcro, losing small clothing items when I exit, and sometimes finding that the pad under me slides around or I roll off, eventually sent me researching. I solved an issue of sagging tarp by first tying it directly to trees, then by getting a larger caternary cut tarp that would keep everything under it dry in the rain, allowing me to keep pack, clothes and sundry items either on the ground beneath the hammock or suspended in a smaller gear hammock from the ropes. Then I started looking at other hammocks.
I found all kinds of hammocks but eventually purchased a Warbonnet Blackbird. A hammocker designed and makes the Blackbird himself, so sometimes there is a waiting list. The Blackbird is easily the best piece of hammock engineering I've found. I store things in the shelf, love the full length side zipper (so many veteran HH users will retrofit theirs with the side zipper), and most of all, the fifteen foot straps - use a biner to clip the strap around a tree, adjust strap length at the tri-rings, tie off with a half hitch, and you are done. Totally adjustable. My Jacks R Better quilt that worked with the HH also works great with the BB. There is a pad pocket to slide a pad in if I want.
Best of all, though the dimensions are essentially the same as the HH ULB, the feel is better - flatter lay, roomier, and just plain comfy. There were hangs that the HH did not feel comfortable; I have not found that with the BB.
It may seem that I have turned this into a review of the BB, but look again - the HH is a good hammock, but there are features of it that I found mildly irritating and solved in another hammock. The things that work in the BB are things the HH does not have. I went from tripping over black shock cord tie outs in the dark to avoiding reflective white ones. A HH is lighter, though, and you will find it's still a pretty good solution to uncomfortable nights on the ground. I found it clumsy using a pad inside with me, a minor annoyance, but still an irritant. I didn't want to retrofit with a SuperShelter when the blue ccf I had worked. I added a JRB underquilt and still found myself fiddling with the setup, as the hang has a lot to do with the geometrics of hammock and quilt. The stock tarp wasn't adequate for side driven wind or rain. Ultimately, it was the little things that moved me forward to a different hammock, which is about the same cost as the complete setup for the HH ULB but engineered with features I can truly appreciate after repeated figure eight lashings. I also find that the BB is consistently comfortable regardless of how close or far apart the trees are, where the HH was not; whether this is the hammock or my experience with hanging in general, I'm not certain.
I note that Hennessy is starting to put out hammocks with a full length zipper. Hammocking is an evolution. :)