I'll be honest, I used to love the Wiki Wiki, but the past few times, only the hood of my car and top half of the sides have come out clean. You drive through and usually the passenger side of the car wash is working sub par....as in the water isn't streaming and the brushes have given up and are barely turning. The last time I went through was a Friday, and it wasn't too busy, but when I brought the dirt that was remaining on my car to the attention one of the attendants, he didn't have anything to say.
The upside. Free vacuums.