First of all, I have never met Jesper or had knowlingly contact with him. I talked to a guy named Carlos and a guy names Oscar gave me the keys. It sounded like they have an office called Minty Host. There was nothing personal in the apartment either. No pictures of people, no signs of life (except for three ants). And it feels like I give a review to a company than a host.
We had some delays at our arrival but Minty Host managed that we could get into the apartment after 10 pm. Which was really great. The apartment was clean, everything was there, even an iron. The apartment is only five minutes from the Principe Pio station. So it's really central in the heart of Madrid. In five days, we only used the Metro to get to the airport. Apart from that, we could walk to every location (Palacio Real, Plaza Mayor, Almudena Cathedral). There were two bedrooms and there was a foldaway bed in the living room, which was comfortable too. The apartment is exactly like on the pictures.