I stayed for two nights in one of the private rooms, which was simple but had everything I needed and a really comfortable bed. The location is fantastic - it's in a cool barrio and in the central part of Madrid. The flat was clean, the host kind and friendly, and the check in and out process smooth. There were some noises that woke me up very early on the second morning, which I think was from other guests coming back and moving around the flat. As it is a flat shared with other travelers, this is to be expected, but it might be something to keep in mind if you are a light sleeper.