This was very disappointing and not up to previous standards of my experiences with BackMarket.
The unit was filthy, the internal replaceable charcoal filter was dirty and old (cost 99c each to replace).
This supplier clearly has no respect for their customers and needs to improve their service, or Backmarket needs to bar them from using their website - I would happily have paid €5 more for a clean unit.
The hinge of the door covering the water reservoir was broken and looks like it had been broken for some time, based on the state of the break.
Also the packaging was not properly done and the unit could have been broken even more in transit.
I have detailed photos.