I have had a Clark long enough now to...
I have had a Clark NX-250 for about 5 months and have used it in the swamps and dry scrub forests of Florida to an ice cold outing at the top of Blood Mountain Georgia this past Dec. So far it's the best investment I've ever made on shelter gear (much better than the best tent I ever owned). I bought the NX-250 because if could only have one hammock I wanted it to be the most versatile one I could find. While up on the mountain the temps got down into the teens and I noticed no condensation or frost on the inside. I didn't use an under quilt because I don't own one. Instead I used a space blanket with a g.i. surplus inflatable pad on top of that and a 30* bag. I also stuffed the pockets with my extra clothes. The only problem I had with the cold was when I shifted during the night and my feet ended up off of the pad. A stainless steel uninsulated water bottle filled with boiling water made a wonderful bed mate that night.:D. Anyway thats my 2 cents worth, I'd offer more but nickels are hard to come by these days.