I’m always looking to go lighter and smaller with all my gear. About a year ago I picked up the Therm-a-Rest NeoAir Sleeping Pad. So after a few hundred miles carrying it and many nights sleeping on it, here is the skinny:
Pros:
Packs small (about the size of a water pump),
Light (relative to other sleep pads),
Comfy
Cons:
Expensive (compared to equivalent mats),
Loud (sounds like I’m digging into a bag of potato chips when I roll over),
Manual Inflate (no self-inflate like other mats, tricky at high altitudes)
Overall for me, the pros definitely outweigh the cons. I sleep great on it. I like not having to carry a giant foam mat. And I’m a heavy sleeper so the noisiness doesn’t bother me. But I’ve heard from light sleepers that the noise (and the anticipation of the noise) keeps them up.