We had a great stay for Christmas in Ricardo's, which is beautifully done out and equipped. The kitchen had everything needed, I even cooked Christmas dinner there, and the open plan space makes it very social. We were with my mother who is getting on and feels the cold so I was a bit worried it would be too cold for her in winter in Madrid, anything but, it was gloriously warm. The situation is great, just over the road from Reina Sofia and very close to the other museums and the Retiro park, and of course Atocha to get anywhere else in Madrid or nearby towns. Often on Airbnb you see flats owned by speculators cheaply done out, this was the complete opposite, a clearly loved home with everything needed for any length of stay.