We had a very pleasant stay at Davids apartment! I would highly recommend it!
When we arrived, David was already waiting for us and he showed us everything we need to know (including some great neighbourhood recomendations!). There were towels, bedsheeds, toilet paper, even some basic stuff in the kitchen, everything was prepared for us. The apartment is just like it is on the pictures, there is the kitchen, a bedroom, the bathroom and the comined living-/dining room. The bed is very comfortable, sometimes you do hear noises from the neighbours, but I guess you can hardly avoid this. The kitchen is fully equipped. The apartment is very well located, the metro stations Lavapies, La Latina and Tirso de Molina are very close. It's also possible to walk, the city center, the museums and the royal palace are only around 15 minutes away. In case we would have had some questions, David was always available to help.
It's a great place, we will come back when we are going to visit Madrid again!