Stayed at Carlos' apartment with nine friends and it was fantastic. There were ten beds which meant no one had to sleep on the sofa and it was plenty big enough for all of us to be comfortable. There was only one bathroom but we managed fine. We also really appreciated that there were plenty of towels as well as toiletries and some basic food items for us to use. Having a washing machine was also useful.
The main selling point though was the location. The apartment was right next to the Plaza de la Merced and was a two minute walk from the town centre and ten minutes walk from the beach. We found we could easily walk to everything we wanted which included the castle, amphitheatre, bullring, park, shops, restaurants and bars as well as the main bus and train stations which we used for trips to Nerja and Ronda.
My only concern was that Carlos' father gave us the keys and showed us around the apartment but he did not speak any English. This was fine as we had a fluent Spanish speaker in the group but had we not we would not have found out all the useful information Carlos' father gave us.
Overall we had a great stay and would highly recommend!