Sarah and Frank are absolutely stellar hosts. We had great communication in the weeks leading up to the trip, and they were in close contact from the time our train arrived until Frank showed us into the apartment. His tips, orientation to and information about the city was outstanding. We took his advice for almost all of our restaurants (Estrella was a great hole in the wall vegetarian spot. The flavors were fantastic, and price was reasonable!). They were available for questions during our stay (we needed a spot to store our luggage between the 11 am checkout and our 430 pm train, and we wanted to know what the local herbal liquor was. Bechkarovka? Got a bottle!)
The apartment was PERFECT. Stunning, luxurious, comfortable, beautiful, with heated floors in the main bathroom and floor to ceiling windows. Located just over fantastic restaurants (La Bottega was DELICIOUS), but not appropriate for the late night light bites we were hoping for. Go there when you want a fancy going away dinner)
The location is close to everything; walking distance to all the major sites. But bring comfortable shoes! We averaged 11 miles a day while we were there!
The streets are obviously ancient, as they're almost impossible to navigate, but their charm overrides the frustration. Don't worry, the hosts give you a great map!
I can't say enough. It was wonderful.