I prefer the hammock for my BOB. I think it's much more versatile and comfortable than other shelters. In cold weather, when bug protection is not an issue, a Hennessey can be hung inside a lean-to and used as a regular hammock rather than bottom entry.

I haven't tried it yet but intend to this winter. Laying on top of the netting should allow me to feed the fire in front of the lean-to periodically without getting out of my sleeping bag. I'll try to post a report and pictures after.