We have used both Go Airport Shuttle (which seems to be the official service in FLL since they are linked from the FLL website as well as SAS. GO we have used from FLL to hotels in Miami. SAS we used this past August (shared ride from FLL directly to POM). Also used SAS back from POM to FLL a couple of times. Overall pretty easy. Give them a call, they tell you where to meet the van. We did grab a taxi from POM to FLLL back in March. Cost of it was around $75.