Pleased on balance
Used this product 7 days camping in temps as low as 30 degrees in Glacier. Comfort is similar to bed once you discovdr optimal inflation level. I will be interested to see its warmth in below 0 temps this winter. Inflation dosen't take too long after you get the hang of it. You have to shake the bag so it opens fully and appears like a cylinder, then you roll up the open end just enough to seal it. Brace the inflated bag against your knees with the bottom tipped up slightly so the air tube running from the bottom of the tube to the matteress isn't cripmed, then push down on the cylinder to expell air into mattress. This whole process as described takes perhaps 4 seconds. Having a non slip surface under the cylinder helps it stay in place.
Negatives. 1. The connector hose between cylinder and mattresss exits fromm bottom of cylinder requiring that you tilt it on edge to use. Relocating the tube to side of cylinder whould eliminate this. 2. Top of cylinder should be sealable to it could be used as inflatable pillow rather than a stuff sack for clothes.