Everything was really nice. The apartment, the location, the communication with Alvaro y Pepa,... even though the apartment is rather small for 2 people for 1 week. But as it was so cosy we did not miss a thing. We loved our stay. The only thing we did not like so much was the smell from the drainage. But Alvaro y Pepa prepared some nice vanilla candles :) In addition to that we were offered a pick up from the airport and the they recommended really nice places to us. Thank you Alvaro y Pepa!!!
One hint for people with a rental car - parking in the city center is nearly impossible. Go for the Parking Escuelas Pías (Plaza de Ponce de León 11). It's 60€ for 5 days and pretty close to the apartment.