I had a wonderful stay at Ian and Paul's. The apartment is super close to "Ibiza" metro station and 20 minutes away from the city center on foot through the beautiful Retiro Park. The room is cozy, sunny in the mornings and cool at night. Overall the apartment is very clean and stylish. Ian and Paul are excellent hosts, warm, polite and always ready to help you out (especially if you're visiting Madrid for the first time and need some tips about museums and places to eat). I would definitely recommend them!