I really loved this place and I would recommend it for 2 persons!!
The apartment was exactly as on the pictures. It's cozy and has all the amenities needed (in kitchen, bathroom and living room).
Very important for me was that it would be quiet inside the apartment (Madrid is very noisy!). And like promised: it is soundproof! That is unbelievable if you know that Plaza Mayor is only 100 meters away and there are a couple bars around the corner.

The only downside would be that there is not enough warm water for 2 persons to shower normally. You have to be really quick. We managed it so don't let this be a big problem for you! Only for 4 persons I wouldn't choose this place because of the water.

Alberto is a lovely host.. he is really kind, helpful and interested. You can always ask him for help! I would definitely go back to this apartment when I'm in Madrid the next time.