The apartment was great, centrally located amongst bars and restaurants, only a short walk to the city centre - but also very quiet inside the apartment with no street noise. Well stocked with kitchen essentials too!
The only thing to bear in mind is that it's on the 4th floor with no elevator (like many apartments in madrid), so there's a lot of stair climbing involved!
Ramón was a great host, promptly responded to all our queries.