Rating: 5 / 5
Around 1980 I heard about Thermarest pads. Air mats had a bad reputation then, but after testimonials from the American K2 expedition I purchased two "seconds", supposedly cosmetic blemishes.
After a year or so of frequent use one of them leaked. I brought it to the Cascade Designs factory in Seattle and they fixed it within about 10 minutes (they resealed an imperfectly sealed edge).
A few years later plastic valves replaced the brass ones, and they sent me two free replacement kits.
About 20 years after purchase, having mainly been used for car camping with kids, one leaked. The internal coating near the valve wore out. I shipped it back and received a brand new one a short time later...mine was not repairable.
About 25 years after purchase the other one started leaking in the same way. We were in Seattle a few days before our two-week Wonderland Trail hike, so I brought it to the factory. They said it would take a few days to look at it and repair/replace it. I said we had no time.
They then just gave me, FREE, a pad they had just repaired to use on our trip! And a few weeks later a brand new pad arrived at my home, replacement for the now 25-year old pad that was not repairable.
Folks, customer service doesn't get much better than that!