Alex's apartment was comfortable, airy and afforded us a very pleasant stay. Alex is very genial and amenable (and very well traveled). We had an issue with the hot water not working on day 1 and he came over and helped fix it before the day ended. His apartment is over 300 years old, so it has its period charm and quirks. My favorite quirk was the clothes line where you hang your clothes to dry. Reminded me of my childhood in India.
The location of this apartment is fantastic. We walked to Retiro Park several times. We also were able to hunt out a wonderful gluten free bakery (Celicioso) that was around 10 minutes away. Our stay in Madrid was my favorite part of our trip and Alex's apartment add to that sentiment.