We are using Millenium Limos to take us to the port in Miami from FLL and to pick us up at the port when we return and take us back to FLL. They are only charging us $85 each way, (4 people in the limo) and that includes the tip. We saw them recommended by other people on these boards and they've been very quick to respond to my husband's inquiries. They also told us what time they should be at the pier on our return since we haven't cruised before and weren't sure. They have done it many, many times it seems.
never liked taking the shuttles, have to wait until the bus is full and all the luggage is put on and then dropped off at the various terminates for the airlines. It is much easier to hop in a taxi or a private car and just go to the airport, I feel its worth the extra money!