I liked the apartment! Very clean. Nicely decorated.
Great location, few min walk to everything interesting!
The reason for giving 4 starts (and not 5):
1) it is 1st floor (one above ground) on narrow street with pub just on opposite side.
Noisy. During October warm weekend nights till ~3:30am, on Monday night only till ~1am.
Didn't disturb me or my family. We were so tired browsing Madrid streets & museums, so we just fall asleep. But light sleepers might consider bringing ear plugs.
2) Juan is really nice person. After meeting him (for keys) we easily could understand each other, using google translator. But initially there was a moment, when we arrived to the mentioned address (taxi, suitcases), I'm calling the provided cell# staying on the street, and answering person doesn't speak English. That was easily solved (and compensated by cup of great hot chocolate, many thanks!) after he stepped out toward us, but I had a moment thinking "where to go with family & suitcases in Madrid in that afternoon hour".
If you speak basic Spanish - shouldn't be a problem at all.
Suggestion to Juan: please give a little better explanation to renters where/how to find you!
3) Another suggestion to Juan:
a) please check the front building door key. Sometimes it took me time to open. Probably should be replaced.
b) please sharp the kitchen knives. I couldn't cut lemon & tomato.
Overall - we had great time in Madrid and liked the apartment.
Location is unbeatable! With just couple easy touches Juan might make it from "very good" to "perfect". I'll stay here again.