Staying at Anna's was a treat. It's very easy to get her house from the airport by metro. Although the place is the basement of a house, it really feels like a self-standing apartment as you have everything you need there and your own entrance. I used the flat as I was coming to Madrid for work and found it both functional and cosy; I actually plan to come back for a leisure weekend with my girlfriend. The flat is decorated with taste and really feels like a home as there are furniture, books and even a nice sound system to play music. Last but not least, Anna and her family are very welcoming and extremely helpful: they have been kind and responsive and we had an interesting conversation. An excellent option for Madrid, highly recommended