Just what you need for maintaining a washed car. It gives a slight extra shine and water repellency. I used it before drying the car on a wet surface as recommended by the manufacturer, and it indeed speeds up the drying process. The downside is that if you use it with every drying, the product will run out in 3-4 washes.

The truth is that whether you have it or not, you won't notice a difference. If you're a clean freak who, at the slightest dirt or when something falls on the car, is with a cloth from the trunk, then it's for you. It doesn't work on type of salts from water. In general, if you want to wipe something on the washed car while avoiding creating "spider webs" with a dry cloth, okay. But as I mentioned earlier, it's a clean luxury to have this specific product