After a few years service I woke up last night on a deflated pillow :-(
On blowing it back up it no longer holds its shape, the sculpted "hollow" for your head has gone at one side and it then deflates over 10-15 minutes.
I _think_ it's got a lifetime warranty so will get in touch with the distributors when I'm home. 2 more nights camping this trip, back to the old rolled up fleece sweater!