I recently stayed at the Stafford in London and had a delightful stay.
From check-in to breakfast to drinks in the American Bar to the room, everything was perfect. A wonderful touch was personalized stationery with my name and the hotel's address on it (in two sizes).
In my review, I positioned the Stafford as a contrast to the large and somewhat faceless luxury hotels in London and I really believe this to be the case. As a result, I felt more like a guest in a private (and well-staffed) home than in a hotel.
A few photos of my room (bedroom, living room, desk) below. My complete review is
online here.