I had a very pleasant stay in Alejandro's apartment.
Communication with Minty was good. I had to wait for 20 minutes or so to check in, but this was due in part to the early arrival of my flight.
The location of the apartment is great - close to the park and very peaceful, but also central. I didn't notice many amenities in the streets closest to the apartment, but I got around the city easily by Uber and I appreciated the tranquility of the neighborhood.
The apartment itself is a good size and has a light, airy feel. It is clean and well-maintained in general, though would benefit from some minor redecoration (scuffed paintwork in some places and peeling paint on the bathroom ceiling). The kitchen is small and a little dated - maybe Alejandro has deliberately chosen to retain a retro style to match the building, but he might consider some more modern equipment!
Accommodation in Madrid can get expensive at times (such as the weekend of my visit). Alejandro's apartment is a good-value alternative to hotels. Some updating and some more personal touches could make it even more attractive, but I would nevertheless be happy to return.