Rosario is such an amazing hostess! I cannot recommend her enough. The flat you will be renting is in a lovely building that used to be a palace in old Madrid - it is renovated, but it is also historical, so it is the best of both worlds. And the most important thing, the location, simply cannot be beat. You will be living just a couple blocks from Plaza Mayor and a couple more from Puerta del Sol. I can't think of a better place to live in Madrid. Your hosts will help you find all you need in Madrid, and since you are central, you are within easy transit distance from so many places in Spain without having to rent a car. This is an absolutely perfect place to spend a few days or even to spend a couple of months like we did. Either way, make sure you spend some time with Rosario and Federico. They are superb people!