We have been avoiding Supershuttle since my mom's experience with a bad driver on a prior trip.
She and my son were actually looking for the Express bus and found the supershuttle. He told her he would honor her coupon. They got all loaded up, and he proceeded to continue circling the airport over and over again looking for more people. When they got to the hotel, he told her he was going to charge her MORE.....since the hotel was actually in Orange, not on Harbor.
Anyways, the couple of times we used the bus, we had no issues.