I spent three nights in Cristinas apartment on my own during the cold Madrid winter. Tthe house was very comfortable for one or two people, really warm and all in all clean. Cristina was very quick with replies and engaging host. The area is impeccable as you are a few blocks away from the center, but still in Malasana, which is definitely the most interesting neighbourhood in terms of restaurants, cafes and bars. It is a 4 floor climb up, but I didn't mind that at all. One thing, the ladder going up to the sleeping room(s) is narrow, so probably not for large people, I was completely fine, but can see people having issues with that. Thanks for a nice stay Cristina!