Went to Halfords to look at one in person and was just about ready to put my hand in my pocket when two, yes two, people came in to get theirs replaced. Both had failed after only a couple of weeks. It was apparently a known problem and Parrot had issued a recall. Talking to one of them (who actually looked like Hugo with a beard oddly enough) who said that things basically stopped working one by one until eventually it didn't make any sound anymore.

Think I might hold off until next month now, let them iron a few more bugs out.