October 2014; I arrived from the airport and took the metro to Calle Pamplona. You have to change in 2 stations but the metro is so easy and very good sign-posted that you should not have any problem. At Estrecho station follow the signs to C. Navarra; from there it is a 5 minute walk.
The apartment is on the 7th floor. I was warmly greeted by Sadot(and his mother). They are very hospitable. Although I do not speak Spanish and Sadot speaks very limited English was the conversation no real problem (also because he has a translatorprogram on his mobile). The room is attached to the livingroom and the balcony and faced to the west. The balcony is big and there is a shade in front of the window so the room does not get warm. I could use the kitchen and there was made space in the refrigator for my stuff. There is some breakfast materials(cereals, bread, marmelade, orange juice).
The area where the apartment is is quiet. In the evening you hear no noise. The view in the evening from the balcony is great(watch the sunset!). Closeby there is a good supermarket and going to the center is, with the metro, some 20 minutes. NB. get a metroticket for 10 rides. It is a lot cheaper than single tickets and also better then the Madrid Travel Card. You only need the metro to get to the centre and back, the rest you walk. And than the Travelcard is, in my opinion, not worthwile. I am not sure if one can contact me through AirBnB otherwise I could give some more tips. I intend to write some info on VirtualTourist.
One more thing about the room: it is about 3 mtrs by 3 mtrs, there is no (real) chair, there is a TV, the shower is not attached and shared and the bed is 180 cm x 140/160 cm. I traveled alone so for me it was no problem but for 2 people it might be somewhat small. The matrass was, luckily, hard enough and I slept very well.
I had a good time and I enjoyed Madrid and it's surroundings. The transport is, comperably to Holland, a lot cheaper and easy enough. Check the internet though for correct info on musea and transport because my travelbooks were not that accurate. Ok, one more tip: the Prada has free opening times in the afternoons(check the site). At the time you get there there is a huge line of people waiting to get in free, just get in line at the back because once the entry is free that line dissolved in no time. ENJOY MADRID