Malena was super responsive and attentive. All our communication was through email - it was great. All logistics were smooth and she left some breakfast stuff for our first morning, which was really really nice. Lots of contact numbers in a note in the apartment, which was helpful (taxis, etc.).
The apartment is amazing, super clean building, beautiful location - close to everything! And the apartment was great, lovely and very comfortable for 4 people, everything you need. I highly recommend it and will go back next time I'm in Madrid.