We had a fantastic stay in Raul's flat. The flat is very clean and well equipped, it even has a toaster and a kettle. The air conditioning is wonderful to come back to when you have been roaming all over Madrid on a hot summer's day and that and the quiet location of the rooms onto internal courtyards meant that we slept really well there and were able to fully recharge our batteries for another day of exploring, which was great as Madrid is quite a noisy city at night and in some places I've stayed before it's hard to get much sleep in summer in particular.
The location of the flat is absolutely fantastic, it's very close to the Royal Palace and Plaza Espana and that whole area has been pedestrianised and is lovely to walk around. You can walk to through Opera and be in Puerta del Sol in 10 minutes, in fact it only took us half an hour to walk to the Retiro park! And the flat is just beneath the wonderful Templo de Debod, the best place to see the sunset. Also there is is little Carrefour Express supermarket 2 minutes from the flat on the corner of the street which had every thing we needed and very good fresh bread. The flat is very secure and all the neighbours were friendly to us.
Raul was very communicative and helpful. All in all, I can't recommend the flat highly enough!