A year ago last summer I bought a Big Agnes mummy insulated air core sleeping pad.
Insulated Air Core
I really like it. It takes 10 breaths to blow it up and has 2.5 inch tubes. It is rated to 15 degrees. It has primaloft in it. Super comfy, rocks disapear. Anyway, I used it this summer and then in September moose hunting. In sept. it started to loose air at night. I figured I had a pinhole leak. Well, I did the bathtub thing trying to find a leak, nothing, replaced the o-ring in the valve with the replacement that came with it, nothing. I called Big Agnes and they just said ship it back. So I did. A couple weeks later a get a brand new one in the mail. No questions asked. It does have what seems to be an upgraded brass valve and the material is different. It doesn't seem as slippery.
So, Kudos to BigAgnes for standing behind thier products.