I'm sure you all have heard how it works so I won't get technical. I just finished using it and it really IS effective! I have alot of minerals in my water and the filter was successful in removing them all. I have no spots on my paint to speak of. Only do not wash your car in the sunlight b/c it will still dry the soap out. But if you are looking for a spot free, towel free car wash, this is as easy and effective as it gets.

The only drawback is you have to buy more soap and filters every 3 washes or so.

Jesse