Henrietta was the most welcoming host. Her home is absolutely lovely and the daily breakfast was great. She is so willing to help you find things to do in the city and is full of excellent suggestions. Her apartment is so centrally located you can get anywhere rather quickly. If you have trouble lifting things, getting your luggage up the stairs (since there's no elevator) will be difficult but other than that I have nothing but excellent things to say! I highly recommend staying with Henrietta, it will definitely enhance your time in Madrid.