Right now the biggest problem with them is the price tripples given current distribution if you are over 6'. It's a joke as a bivy. If you are going ot sleep on the ground you need a tarp/tent.

The fact that the manufacturer says they are easy on trees does not make it so. As a climber I have seen the damage webbing does to trees over a long enough time. And hammock loads are significantly higher than toprope loads. The impact of hammocks is probably zero in your average stealth situation, but it could be significant in a camping type area. There are some camping areas that require tents to go to specific platforms you couldn't mount a Henn. on. I feel we are in for a Snowboarding type reaction when the parks will at first not notice them, then restrict them, and finally maybe learn to live with them. Just a guess.