I think I saw that you posted under cab fares that Bully is driving you to and from the airport. (I apologize if I read that wrong.) He'll give you a pick-up time and get you to the airport right on schedule, so you have no need to worry. Twice, we've left during some huge event going on downtown, and Bully, or his relative, took us to the airport by a quick detour rather than sitting in traffic. They know their business, hands down.
I don't want to make this a rule of thumb, but he or one of his relatives who drove us in his place, have always been to our hotel at least five minutes prior to our set time to depart, much to my husband's relief. There's probably nobody more anxious about getting to the airport on time than him. Due to his work, he travels a LOT and has run across almost every type of delay, so he's ever the pessimist when it comes to getting to the airport.
(I do want to add that in all the years we've been going to Aruba, we've only had one driver that overcharged us that we know of and it was only a dollar, 99% have been super friendly, and I think they all pretty much know the ends and outs of getting around Aruba).