Yep, it was a breeze to set up - and then created gales of hilarity when each of us tried to fold it away again! It is a shame we didn't film the comedy of errors over those 30 minutes or so of repeated frustration!
I have since found very straight-forward instructions on YouTube, demonstrating the correct (and quick) method of pack-up. It's not nearly as funny though!
If you take a moment to view the movie on YouTube, you can read various appreciative comments. Against some of those anecdotes, it seems we didn't do as badly as we thought. More than one poster had given up and strapped the non-folded (but presumably flattened) ensuite to the car/trailer for transporting home!