The apartment's location is excellent. a 15 minute walk from Parque del el retiro + many other beautiful Madrid must-sees. there are plenty of supermarkets and cafes in the immediate vicinity (the seafood restaurant on the corner is a particular delight) which makes everything a lot easier.
the apartment itself is small, fit for a solo traveler over a longer period of time. it's a little tight for a couple though. the kitchen has everything you need for a short stay and was in immaculate condition when we arrived. the bed was very comfortable as was the sofa after a long days walking.
while we were there, we had a couple of instances of power outages in the early hours of the morning. even at this time, the 24-hour telephone reception was great and immediately had people out to sort the problem. our host in general was excellent, they replied to all our questions within minutes and were extremely helpful.