I had a great stay at Duchy House, the team is so nice and really help you with the details of your stay. The shared bathroom was always clean but I guess that depends on the other guests too. I stayed in Duchy House during the heat wave in London this summer, so the room was really warm because there is no air conditionning, but I think in normal times it's perfectly fine.
Thanks again to the team, I had a very pleasant stay and would love to come back again !