Alfonso is a very nice host! Always ready for some small talk when you are and is very helpful with giving local tips. The apartment is located in La Latina, which is absolutely a wonderful neighborhood of Madrid. It is very lively but at the same time you can enjoy some quietness in a big city such as Madrid.
I stayed in Alfonso's apartment for a week before I could move in to my permanent room for the rest of the semester and I couldn't have thought of a better start!