We had a great stay at the Belsize Park flat. At first we were a bit surprised by the long steep stairs in the hallway but after that it never really was an issue. The benefit is to be on the top floor and have a roof deck with a view of the city. As it was exceptionally hot when we stayed in the flat it was absolutely fantastic to have access to the outdoor space and we had dinner or drinks there almost every night. There is a bit of fan noise outside but it is easy to ignore. It was also easy to keep the flat cool as it is easy to get a draft at the top floor and also that there was a huge fan in the bedroom. Location is excellent and it is really a beautiful neighbourhood. Being a runner I appreciate that Hampstead Heath is so close by. Communications are also easy and the tube station is close but we often used the buses, 168 to Chalk Farm, Camden etc and especially C11 from England's Lane that takes you to Swiss Cottage and on to the Jubilee Line, coming back it is easier to get the bus from Finchley Road as it is just outside the station and there is a Waitrose right there for groceries and there is also a taxi stop where, if you are lucky :-) taxis are waiting. Excellent communications and info from the host so we never felt we had to worry about anything. All in all a great stay and warmly recommended.