Christian is as good a host as possible: accessible, approachable, concern. He'll make sure every single detail is perfect for your stay by asking, never in an intrusive way, if everything is to your liking, by leaving touristic information available, etc.
The apartment has a lot of character, it's big enough for the amount of people it announces itself capable of, you have all utilities you can ask for should you choose to stay a little longer in Madrid, it's located at the very heart of Chueca with all conveniences nearby (supermarkets, restaurants, bars, clubs, mercados, gran via, sol, theatres, shops, etc.)
Highly recommended!