Totally worth it, in the current video I am testing it after 1.5 months of application (2 coats with a 20 minute interval between each coat). You wash the car well, dry it thoroughly, and apply it with a microfiber cloth; after the recommended time has passed, you wipe it well with a new, clean cloth

I decided to use it for fun on an incredibly worn-out 2001 Hyundai Atos. The windows became like new... Besides the fact that not a drop of water sticks to them, the impressive thing is that even dust doesn't stick and the windows and mirrors stay clean for a very long time. Amazing product, I will definitely buy it again!

Ok, it takes me about 15 to 20 minutes to apply it to all the car windows. In winter I apply it about once a month and it has lasted me over 3 years. It does what it promises. And for about €10, it's value for money

The K2 Vizio Pro water-repellent spray for glass offers an amazing result in the rain, with water "sliding off" the windshield easily and improving visibility, while its application is very simple and quick.

The product is excellent!
Simply, in this product as well as in other similar ones, it requires specific application and mainly SPECIFIC PREPARATION...
1st... Glass cleaner
2nd... Clay
3rd... Cleaning polish for glass preferably with a polisher for better cleaning (dirt, scratches, etc.)
4th... Cleaning the glass with a solution based on isopropyl alcohol
5th... Follow the product application instructions and apply the product twice
6th... Have enough clean microfiber cloths to properly wipe the product on the glass and you will have excellent results...
The bonding of the product to the glass requires some hours...

A video about how it is applied.
If it is applied hastily and carelessly, the only sure thing is that it will not work.
You need to dedicate some time to apply it.
Minus one star because it left some small smudges for me (after about a year and something).
Maybe I should reapply it over time.
In a comment, the same "issue" was mentioned and as a solution, it was suggested that instead of applying it twice, it was applied once.

My own short video with 120ml without the use of windshield wipers.

After 10 rainfalls, the windshield needed refreshing again. At low speeds, the use of windshield wipers is necessary. The application of it has a very strong and unpleasant smell, I would recommend using a mask especially if you have breathing problems. The price of it is very good.

And yet it works. Even after a while. 2 passes, 15 minutes drying time in between, and it's ready. It goes without saying that it is better to have applied the primer first or even putty.

It has no durability, at least for mine, windshield wipers. Under the conditions I used it, it is not recommended.

The negative comments that talked about streaks in the beginning made me hesitant to purchase the product. Eventually, I went ahead with the purchase, thinking what do I have to lose at such a low price. Buy it without fear, it leaves no streaks, it is an excellent product. Apply it after washing and drying. Let the product dry and then wipe the windows with a microfiber cloth. During the winter or rainy months, continue to apply once a month and you will have excellent results.

I bought it and it really is the best. (It is only for external use and not for tinted from the inside) It is applied the same way as ceramic, I recommend it for Full.

It does what it says and more, but when you apply it, it scares you. With strict adherence to the instructions, it leaves a haze that you think will never go away. It takes a long time for it to "settle" as a material and for the haze to disappear, but the waterproofing is fantastic. I give it a 4 because if you don't spread it very well in some areas, it holds material and looks strange.

I bought it out of curiosity.
It works, in the end I passed it well with just kitchen paper and there was no haze or anything.
After 80km/h you don't need windshield wipers in light rain.
I haven't had the chance to drive in heavy rain yet.

Today, when it drizzled a little (1.5 months after the first application), it still does the job.
After 2-3 days of the car sitting, dust is visible on the glass, I turn on the windshield wipers and there is nothing left, without using any water sprays.

From me, get it, spend some time on it, give it time, and as I said, if there is any haze left, a good wipe with kitchen paper will do the trick and everything will be fine

Amazing crap... I was influenced by the reviews and wasted my money. Difficult application and afterwards the windows have a haze (like a café where 800 people smoked inside, it's morning and the sun hits the glasses diagonally, showing the handprints from cleaning that took place last decade).
I want my windows crystal clear without any haze, if you're like me, don't get it. Oh, worse than a smoked glass. To finally remove the material, I had to use two hands with a lip cleaner overlay and another two hands with ammonia to make them like before.

Παιδες παρτε το χθες. Για να δουλέψει αψογα θελει τσχυτητα ανω των 60.σε ταξιδι εθνικη εβλεπα καλύτερα σε βροχη χωρίς να χρησιμοποιείσω υαλοκαθαριστηρες.

Seeing the reviews and since it was going to rain the next day, I bought the product and applied it to two different cars. In the 2nd photo (passenger window), the product has not been applied. In the other two, it has. The difference is noticeable, I think, after one night of heavy rain. I hope it will also help me when driving at high speeds.

It is the best thing I have used in the car!
It lasted me 1 year and it still continues to repel rain from the windows.
You will spend at most 1 hour dealing with it and you will be worry-free from rain for at least 1 year.
At speeds over 60 km/h, it performs miracles. Also, the more rain it encounters, the faster it clears away from the windows!

Excellent! I'm amazed at how well the fine rain (I haven't tested it in heavy rain yet) just rolls off. I don't even need windshield wipers on the highway, the droplets just slide off.

I applied it to all the car windows, front, back, and side mirrors. On the back window, the droplets just sit there without bothering me.

I will see how it holds up or behaves when the rear windshield gets heated, but I consider it essential for all cars!

updated 7.12.21

It's better than I imagined! In heavy rain on the highway at over 90km/h, you don't even need windshield wipers. Amazing clarity. I also applied it to the mirrors that I had issues with in the rain, and now I can see clearly no matter how hard it's pouring!

Very good product and easy application.

I don't know about the durability yet.

After 5 months, the material starts to weaken, but it still works on glass.

Good cleaning with glass cleaner, then wipe horizontally once and divide the glass into small sections (divide the glass into 4 parts), then after 15 minutes, wipe with a microfiber cloth and a second wipe after an hour using the same process as the first wipe. If it doesn't clean well, spray a little water on your cloth and wipe, changing sides of the cloth.
(Without cleaning again with glass cleaner)