I stayed at Kevin’s place with my mother while we were apartment hunting in Madrid. The location is really great— right near the Royal Palace and right next to a large transport hub (metro/cercanías/renfe/buses). The room itself is a bit small, but as long as you don’t have 3 suitcases like I did you will find it comfortable. The apartment is nice, and the coffee and tea station is a lovely touch. Communication with Kevin was easy. At one point the wifi stopped working, but Kevin had the porter/concierge of the building come fix it for us immediately. This room is a good choice if you’re on a budget and want to be in a great location.