It was even better than we expected! William was the coolest guy, gave us a lot of tips and was very kind, and the apartment was really good. Metro station is basically under the apartment and you've got a big room with fully equipped private bathroom, you feel private. The room is in the city centre, but it's quiet and warm - nights in Madrid are usually cold, but you've got a heater in the room and it neets only a few minutes to warm up the room. You honestly can't expect anything much, our stay in William's apartment was perfect and I would love to be his guest once again. I strongly recommend it!