I just got my Clark NA Monday and spent the last three nights in it. Last night was perfect - I slept on my back and rolled over on both sides during the night - just like in my bed - and woke only once that I remembered. seems I figured out the best hang angle and sag.
But my son told me last night that he now wants a hammock - he goes to school in the Adirondacks, went hiking with some friends last weekend, and saw a few hammocks being used. He is only 5'11" and I'm 6'3" so I'm going to send him the Clark. I ordered a Claytor Jungle for myself - it appears to be longer and wider than the Clark, and it is a lot less expensive.