Covadonga's listing was overall excellent. Very nice location, all the proper amenities and a very comfortable apartment. The lack of a centralised heating system could be a bit bothersome for those who are more sensitive to cold. It was ~17 °C in late March - we would have preferred it to be a bit warmer. There was one heater available for us, which worked just fine, though.
Covadonga herself was very nice, was flexible for the check-in and available for any question.
Overall, I'd highly recommend