I guess I am a little different in that I had a good experience with Supershuttle, although we did circle the airport 3 times picking up more passengers. Granted, you will have a party of 6 so that may not be an issue. What may be the time consuming part is getting a van that is empty, vs one that has a couple people already in it. For our return back to the airport, they were right on time with our pick up also. They did have a private van option, that you may want to consider given the size of your party...