We both enjoyed the stay in the apartment of Mezzanine very much: Very clean, large enough for a several day trip, perfect for cooking smaller dishes by your-own. But that's probably never needed as there are many great tapas bars and restaurants very close by. Our top recommendation for Sherry lovers "La Venencia" (but keep to the rules ;-)
So for the culinary + cultural sightseeing you just need comfortable shoes, but public transport is also close by! Even centrally located is was quiet in the nights, with windows opened!
So great apartment for a nice Madrid trip.