We had a lovely stay in this flat (even if the building is basically a hotel considering all the rooms are also rented probably on AirBnB as well)
soundproofing is not that great, but it's pretty commun in old buildings
and a small smell could be annoying coming from the bathroom (in my opinion, it's the water system) but nothing that can't be fixed by opening the window a few minutes.
Other than that it was very pleasant
Notting Hill station is just a few meters away
lot's of restaurants and pubs
all convenience close to the flat
the key system is very nice also
Max and Billie were very helpful, and the place you can drop your bags before arriving is not very far and people are quite helpful too.
I would recommend, for a short stay