We only stayed 2 nights, but we really enjoyed it! The room is big enough and comfortable, very cosy and clean apartment. Even though it is a bit further away from the city center, it's so easy to go there by bus (bus stop at just 3 min walking). We didn't see each other a lot as we were in the center all day, but Mercedes asked us every day how everything was and send us information about Madrid, really helpful and super friendly :)