As a full-time hanger I can also attest to the difference in sleep. I have knee hyperextension issues. Anytime they go past straight I get pretty irritating pain in my knees. Why am I saying this you ask? In a bed, and it doesnt matter what kind, my knees hyper extend mostly due to the fact that I'm tall and my feet hang off the bed. This causes the common tossing and turning that most people experience when sleeping in a bed. In a hammock i have a few positions, of which i do not have to move from, that I can sleep in allowing me to rest better.
Who needs to pay $5000 for a bed when you can pay $10 and have twice as good of sleep?
"We do not go to the green woods and crystal waters to rough it, we go to smooth it."- G. W. Sears
My forum name is Fish<><; I'm in the navy; and I hate sleeping on the ground. If I didn't need ground to walk on or measure resistance to, I think I could happily give it up.