Anabela is the perfect host, very friendly. Speaks good English and very helpful. Her studio apartment is one I recommend to singles or couples.
I was visting Madrid for 5 days. Such an amazing city. The neighborhood where the apartment is located, Malasaña, is very hip and full of live. Every morning I had breakfast at Lolina Vintage, a cool and hip café where you can have everything from breakfast to cocktails.
The building is in a quiet street and you'll no noice at all from the outside.
The apartment is just a 5 min walk away from the metro. The connections are very good, from Madrid Airport to Tribunal (the closet metro stop to the apartment) is about 25 minutes, with one change at Nuevos Ministerios.
The apartment acommodates in all your needs, clean and all uttilities present.
Next time I'll visit Madrid, I know which apartment I'll stay :)