I bought the wife an Eno and have spent a couple PM's napping in it. I didn't find it all that comfortable. When I looked into insulation, I came away with sticking with my 2P tent. Likely the main difference is that I use a Big Agnes self inflating pad. Its 2.5" thick and can be a bit warm but I find the accordion closed cell pads more than uncomfortable.

Adversity doesn't build character, it reveals it.