I bought this in March, ready for my camping trip in June. It arrived promptly and the first thing I did was pump it up, as I have had another airbed which was 'dead on arrival'. It stayed up and I was pleased. However 3 days into my camping trip it developed a leak and wouldn't stay inflated. Checking for the leak I found it was where the plastic is embossed in order to create the dimples. This was on the flock side, so non repairable with a puncture repair patch. Very disappointed.
However just to be fair to the designers of the valve which has come in for criticism. There is a technique which must be used to stop all of the air rushing out, after you remove the pump, (and I used a foot pump. You don't need a fancy battery powered jobby), push the valve neck back to seal against the internal stopper before removing the pump. That way the air stays in until you fit the external stopper.
Mind you if it then develops a leak in the body of the bed, like mine did, all of the clever valve design is pointless.