We had a lovely stay at Carmen's apartment! Carmen herself was very attentive and kind, checking in every so often and being available for any questions we had.
The apartment's location is ideal, a 15-25 minute walk to all the attractions and restaurants we visited - we rarely took the metro. The decor was very charming, and the space was comfortable and looked just like the photos. Although there was no aircon in the flat, opening the windows in the living room and turning on the fan in the bedroom worked alright during our stay at the end of August.
The neighborhood was quaint with convenience stores, pharmacies, coffee shops, and bars all within short walking distance. It was however fairly noisy at times, so do keep that in mind if you plan on spending most of your days in the apartment.
Overall, we had a great time and would stay here again if we ever find ourselves back in Madrid. Thanks Carmen!