This is a great location for seeing the island and all the action in San Pedro. Alex has wonderful suggestions on where to eat (authentic and not touristy), how to get around the island, snorkeling options, etc. Between Aileen, Alex, and Leticia the place runs like a 5 star hotel.
The apartment is well appointed, spotless, beautiful views from a private outside sitting area of the ocean (as well as a more expansive view from the rooftop), shopping right around the corner including fresh pastries and fruit, and an easy walk down the beach to the center of town.
I highly recommend Aileen's place. You won't be disappointed.