We've got two Thermarest Mondokings.
Expensive but super comfy. Discovered that one of them (brand new) has a faulty inlet valve. It's not 'one way', so is making topping up the air a little tricky. The carry bag doubles as a quick inflater but due to the valve being faulty, as soon as you try and 'fluff' the bag for air, the airbed deflates before your next attempt. I did blow it up with a battery inflator, but that's not the point when the air bed is £220. I've emailed asking for a replacement as we bought it nearly 60 days ago, but not even opened. The daft thing is, I checked one of them last week, but as you'd have it, not the faulty one. After blowing up and locking the valve, it functioned perfectly. They do deflate and roll up very quickly once you open the 'out' valve.