We spent two nights at Hacyon Day's 3rd floor flat (they have several flats on 3rd and 4th) and had a very pleasant stay. It is very well located (in the city center, 5' from the cathedral and 10' from Alcazaba), with nice and modern decoration and very clean. There are all convenient appliances dishwasher, washing machine/dryer), and they placed a cot and high chair for our baby.
The only drawback for us, as a family traveling with young children, was the sound from the street until very late in the night on the Saturday night. It felt as if we had left the windows wide open.