A simply outstanding(!) place to stay in central Madrid. Carlos is a perfect host, always available for any question and much more. Location is very central, in the middle of the touristy area and within walking distance to most attraction points and cool neighborhoods.
Carlos had the apartment ready very clean and stacked with anything you could ask for, and also a cute fridge with some local treats and food.
Foldout bed takes literally 2 seconds to open, and was very comfortable even for picky people like us. Even though the apartment is in a very busy area, it is dead quiet (interior of building, but with small balcony and lots of light). The building has an elevator, a luxurious bonus in Madrid :)
Located a few steps away from Opera metro line, any place in the city (and the airport) is within reach very easily.
Carlos will certainly be our role model when we host people at our place.
* If nightlife is your thing, Carlos is definitely the guy to get to know.