Just great!
Leonardo was very kind and cooperative. We had a late flight at the checkout date, and even though the apartment was booked for this date leonardo showed maximum flexibility so we could check out as late as possible.
The apartment description was accurate. The location is in the center of madrid but in a quiet street. Close to the metro and many attractions madrid has to offer.
One small drawback:
The hot water in the shower is enough for 1 person at a tine.
Besides that everything was just great.