Been using the Neoair since they first came out something like 8? years ago. One of the top 5 innovations to come out in the last ten years IMO.
For hunting, rather than use an Xtherm, I use an "original" Neoair (size Large) with a 1/4" Evazote ON TOP in colder weather. I've found this comfortable down into the teens. Were I out in colder I'd use the Xthrem and the 1/4 Evazote. If my old Neoair ever craps-out I'll probably replace it with the Xtherm in size Large.
Summer backpacking I use a Neoair X-Lite in size Regular, and no CC pad.
PS, the "Neoair Noise" eventually diminishes with use... still, can't say it ever bothered me.
