We had a very enjoyable stay at Luisa's apartment - the location is fantastic, just next to the main square (Plaça de la Virgen) and the cathedral, many fantastic restaurants (Casa Almudin is a great tapas place just a few meters away!) and also steps from the bus taking you to the Oceanografico for example. The apartment is comfortably furnished, with two separate bathrooms making it very convenient for small groups or families. Luisa was responsive to our questions and queries.
We did find that there was a bit more noise coming from the street at night than we would like, either from neighbors and their dogs or groups walking by, because the windows have to be completely open in the summer due to the lack of AC - although this is probably reasonably quiet by Spanish standards. Also, the apartment gets fairly warm in the summer due to not having curtains or blinds in the living room which is exposed to the sun, which could be annoying if you intend to stay indoors during the day.