It was an awesome experience, starting with the wonderful appartment that Borja and his wife dessigned, and continuing with the hospitality from both Borja and Mónica, who left a little welcoming gift for us and then they were flexible with both our arrival and our departure, letting us have our luggage there for 8h more past the check out time, letting us visit Madrid a little more.
Its location is really good and close to a ton of nice places to visit in Madrid, and with the metro also there in case you need to use it.
We were a little scared because we were travelling in July and it's really hot in Madrid and the flat doesn't have AC, but you really don't need it, it's a very fresh appartment.
I totally recommend the place and when I come back to Madrid I would love to stay there again.