Ordered a 4am pick up to catch a 6 am flight. At 405am, the dispatcher "didn't know where our driver was" and sent a second vehicle, which arrived at 435am. We arrived at Phoenix sky harbor at 530am and ONLY due to the kindness of Southwest Airlines did we make our flight. We called the next day to voice our displeasure, received no apology and in fact was told we should be THANKING them for upgrading us from a shared van to a town car. Supershuttle for us from now on. Sun City express is unreliable and supervisory staff is rude.