Stayed at the property 11/2 through 11/7. Fantastic location. Tube station and restaurants, pubs, groceries right around the corner. Very close to Trafalgar square and other great sights. The building is lovely and safe and there is a 24 hr. concierge.
The apartment was very clean and spacious. As another reviewer wrote, there was a crack in the kitchen ceiling that I understand was being resolved after my departure and the wood around the tub in the bathroom needs a bit of attention. Neither interfered with our stay. I also agree that the bed in the smaller bedroom is not that comfortable. The king bed is very comfortable.
I can't really speak to dealing with the host as I find that you really deal with a management company for the host - who, I must say, are quite nice and responsive.
I would rent this space again in a heartbeat. Overall, it really is great.