I saw this at my local pepboys. FIgured I would give it a try. I just tried using it today. I had a different experience with it:
I had plenty of water pressure even with the last filtersd phase. The filtered, autodry part did not seem to work right. It came out as a vertical fan type spray. It left plenty of water on the car which did bead up. I think I used it right, followed directions, less than 1 foot away for last rinse.
I am letting it air dry now, hoping for no water spots but I am doubtful.