I received this about 2 weeks ago and it makes washing the car way easier. No more of those random water spots on the wheels or paint. You can even let the car dry in the sun with this water on it. My new routine is to still wipe dry the car but not as much as before because the water leaves no streaks. Here is a description from detailersdomain.com
The DIC-20 provides approximately 300 gallons of mineral-free, de-ionized water based on your input water quality. It consists of two 20 inch de-ionization housings that feature replaceable cartridges that simply slide into the watertight housings. The entire unit is mounted on a powder coated, rust resistant rolling cart that makes it convenient to move into position and store away when finished.
And i use these two to help even more