We really enjoyed our stay at the apartment! The location is great! You can reach most of the sightseeing locations, the shopping street and lots of restaurants by foot.
The apartment is modern and clean and nicely decorated with flowers! We especially appreciated the air conditioning in the hot Madrid summer. The apartment also has wifi.
The host was really nice and helpful. He welcomed us at the apartment, giving us an overview over the city and a map.
I would recommend it for two people though. We were three and it was a bit crowded with the suit cases and everything. Even though we had a very good time and will definitely choose this location for our next time in Madrid!