We had a wonderful stay at Carlos and Harralds' apartment. It is clean, comfortable, stylish and located in an interesting and lively area. It is only a few minutes easy walk away from major tourists attractions such as the Reina Sofia and Prado Museums, and Plaza Major, but the area doesn't feel full of tourists. It is easy to find a good cafe or restaurant nearby. Although we didn't meet Carlos or Harrald in person, they were very welcoming and stayed in contact ensuring we were comfortable and seeing if we needed anything. A great place to stay in Madrid.