Price 21.8€ I bought it. There are many options out there, so it's hard for someone to say that one is the best. For this money, this product is excellent! Easy to use, 2 microfiber cloths, spray on each surface, wipe with one cloth and then with the dry one, and then continue to the next spot in the same way. It's good to do it spot by spot for a more thorough job (there are also corresponding videos on the internet). What do you gain? Hydrophobicity, shine, and resistance to dirt, etc. It is an economical solution for someone who wants to do a little extra for their car and make each wash "worth it" because the car doesn't get dirty so easily for a while (always after 3-4 rides I would see dirt and grime in various spots, especially in the back, now I haven't seen any yet). On the car, a "slippery" surface forms (of course, it doesn't leave anything on your hands or anywhere) that you can feel with your hand and it is very nice in texture, and this is also the reason why it gets dirty more slowly as it doesn't let things "stick" to the car. The company claims a durability of 3 months. I find it very hard to believe that this is true. If it is true, I will definitely return to update the review and share some more thoughts.