I Can recommend Luquillo Taxi for your transportation while in Puerto Rico. Based on a recommendation in a TripAdvisor forum I contacted Mr. Shawn Herrera 787 513-7685 for airport transfer from Las Casitas. He is prompt, polite and can be booked in advance at this number. It is his company and his car is very nice..not your average sedan. He is informative and we learned alot en route to the airport. If you have transportation needs I can recommend him including to the ferry for the islands (he might also be available for getting the much sought after tickets). I could not find an area on TA to review Shawn so put it on the forum...if you search his name you will find other recommendations. I really appreciated finding his name in the forums and wanted to pass the word on.