The apartment was a great value for money, on every level. Very clean and cozy, too close to the metro station ( 300 m. from Palos de la Frontera station ), near to Atocha train station. The connection to the airport is very easy, either with metro or even better with the yelllow bus in 30 min.
The area around is full of things to see, starting with the iconic Atocha train station and the area of Retiro park, the Prado museum, the botanological garden and furter the Cibelles city hall and others. The approach to Plaza Mayor and the rest of the city center is very easy. There are also restaurant, tapa bars, super markets, etc.
The apartment itself is very nice and makes the staying a nice experience. It has a big bedroom with a nice and comfortable bed, a living room with a big table for 4 people and a comfotrable sofa. The kitchen has everything you need, even for cooking. The area is not noisy, it's just the wooden floor a bit crispy, but we liked that also ( hehe ).
The overall experience was 5 in 5 stars and I definitely recommend David and his apartment !