A clean and comfortable place and a very warm host who knows the city very well and is kind and passionate enough to give you specific recommendations on the places to visit. Flexible check in/out time is a plus. Moreover, the location is very convenient , a residential area in central which is away from the crowd but not far from all the attractions that you can either walk to or use public transportation very easily to get there. If you like to discover local places by feet ( like I do) you will find very nice cafés around. In general the place gives you a feel of a living in London and not just being a tourist!