We truly enjoyed our stay here! The flat is located in a nice building in a non-touristy area of Madrid. It is in walking distance of a lot of key Madrid spots (Prado, Reina Sophia, Retiro Park, etc) and we were able to walk everywhere. A small neighborhood spot, La Fisna, was recommended to us and we wished we had gone there before our last night! Highly recommend. Very close to the Literary Quarter, a section of Madrid that we whole-heartedly enjoyed.
The only down side was the heat. We expected it to be hot, as we were traveling in mid-June. But it was about 98-100 F everyday and the bedroom only had a ceiling fan. Even with the windows open, it was still unbearably hot at night, as there was not much air movement. Maybe an additional plug-in fan would have been helpful. That being said, if we had come when it was a bit cooler, this apartment would have knocked it out of the park!