The location really is as good as everyone says, very central, near the canal, shops, restaurants, cafes, public transport and so on, and the house itself is charming - very tall and narrow, with a winding staircase, and a striking exterior.
Oliver and Jasmine were responsive and helpful, everything was well-provided and organised.
There is a toilet on the ground floor without any light at all, so far as we could tell, and there are no smoke or carbon monoxide detectors on any floors - and the listing doesn't advertise for any, so we knew before booking - but it's still less than reassuring when you're sleeping on the 5th, 15 metres from the ground.
Nevertheless, overall it's a lovely place to stay and with a few small changes it could be flawless.