I voted for Tiffany. We always use them. The drivers are friendly, usually on time and the cars are in great shape. I have been tempted to try some of the others but we usually just stick with Tiffany. I am considering trying one of the others for our upcoming cruise in November but as it stands now, we have had no significant problems with Tiffany (other than requesting a driver and getting someone else but the popular drivers are often requested so it was not a big deal).