I've taken my car to Spot Free Car Wash in Tempe, near Elliot and I-10 several times. I'm currently an active customer of Cobblestone Auto Spa, but when they are closed and *need* to clean my car, this place has me covered.
One of the redeeming qualities about this place is the touch-less automatic wash. The drier is generous to let you dry off about 90% of the car only requiring you to finish the last few droplets later with your own towel.
The property has plentiful room to get around and offers vacuums, pay-and-spray style wash areas including the automatic car wash.
The only areas to improve: Increase the lighting at night. Lower or place a piece of metal over the "stop bar" in the automatic car wash areas. On my stiff suspension, it's a lot for my car to climb over that and I have to ride my clutch excessively to get over it smoothly.
Overall, this is one of the best 24hr car washes I would recommend in Tempe. You'll be glad to take your car here.