The Sumner didn’t make a great first impression - the reception area is cramped. And there were a couple problems in our room (the only outlet in the bathroom didn’t work, the WiFi was a bit sporadic, and the shower hose leaked). But the bed was soooo comfortable, the water pressure and temperature were great, the breakfast was fantastic (so many choices, hot and cold, and attentive service), and the location was perfect, very close to several things we wanted to do or see in London, and very close to public transportation of all sorts. Overall we give it a 9!