We loved our stay in Casa Nuncio and couldn't recommend it highly enough. It is the perfect location from which to explore the city: in 5 days there, we didn't once have to use public transport - we walked everywhere as none of the sights are more than 20-30 minutes' walk from the flat.
Casa Nuncio is a rare combination: in a bustling area but very quiet at the back (where the bedrooms are), incredibly stylish but cosy and practical, and with lovely touches that immediately made us feel at home. We received a warm welcome from Anna, and both she and Daniela the cleaner were super-helpful.
Good, healthy food is not always easy to find in Madrid, but foodies will enjoy the offering from La Musa Latina, on Plaza de la Paja (about 3 minutes' walk from the flat). And for children who get tired of traipsing round art galleries, the new-ish Rio Madrid park along the Manzanares river is well worth a visit - according to our 7- and 12-year-old boys, its slides were the best ever.