We had a great stay at Raul's.
The flat was comfortable, and had all that we needed. Comfy bed. The front desk to the apartment block was staffed 24 hours, and the staff were helpful.
Location was great: 10 minutes walk from the Plaza de Armas, and close to the metro at Santa Anna. (The metro is very effective...you can get across the city very quickly).
Raul was a good host. He met us on arrival and gave us a good introduction to the flat and the area. He supplied maps showing key attractions around the centre, this was helpful. He was available to us by phone, and helped us with our airport transfer.
Good value.