Housed in a great location, Esther and Daniel's place is charming, functional and just right for a couple. We had a lovely stay.
The only word of caution is about the stairs (this is mentioned already so we were ready for it) -- it is a steep fourth- floor climb up to the flat.

The flat is in the midst of Lavapiés, a delightful neighbourhood full of charming cafes and restaurants and wall art, very close to Museo Reina Sofia and walking distance from Plaza Mayor and Mercado de San Miguel.