I have been using this particular product for over 20 years. At some point, it disappeared from the market and I couldn't find it anywhere, so I tried other brands, but none of them compared to this one. I was very happy to find it again in the Greek market.

I used it on the Dome for the GoPro.
It doesn't leave any droplets on it, although you need to apply it twice and rinse it well. It doesn't seem to corrode the plastic, at least not in this short period of time. If it lasts for 3 months, I don't mind if it gets damaged.
If you spray it, droplets will remain, but if you immerse it completely in water and don't remove it abruptly, nothing stays on it.
It doesn't affect the video quality at all.

I followed the instructions for a double application, on a very well cleaned and dry windshield.

I used a microfiber cloth for the application, and another clean one for wiping off the haze after the 1st and 2nd application.

Very good experience at speeds >60-70, driving almost without using the windshield wipers.

At lower speeds, because the drops do not spread on the glass, it provides somewhat improved visibility, although windshield wipers are still needed.

The product does what it promises and relatively easily without much fuss. I would recommend it and would definitely buy it again!

It does the job, but don't expect miracles. Also, you need to go at a speed of over 80km to see the result

I did not write the review immediately in order to make sure about the effectiveness of the product. I have used it 4 times and unfortunately I was not completely satisfied. It creates a hydrophobic coating, but that's about it. No resemblance to the videos I watched. The car is outdoors, every morning the windows are covered in moisture and on cold days, frost.
I used it before a rainy week and it was just slightly better than not using it at all. I note that I followed the manufacturer's instructions faithfully as well as a plethora of videos. Maybe I am a strict judge or maybe I am doing something wrong. I'm not saying it's a bad product but it didn't do the job I bought it for.

It does what it promises and is very easy to apply, but you will notice the huge difference after 80-100 km and as the kilometers increase, there is no need to use the windshield wipers as soon as a drop falls on the windshield, it breaks into many smaller ones that slide and quickly disappear. Also, the windows do not get dirty in the same way with its application. Maybe under certain conditions, you may not see well sometimes when reversing within the city and there is a nearby lamp or streetlight.

Very nice. Easy to apply following the simple instructions it has, even better using an application pad sponge so as not to waste product, just enough to spread on the windows, let it dry and then spread again and then rinse with a kitchen paper spraying with a little water or glass cleaner and it really works. Even the windshield wiper fluid doesn't sit well when you want to clean them, which is even less necessary because even the dust/dirt doesn't stick to the glass as it used to. Excellent and well done. As advertised. Even if it doesn't rain, it's worth it for those of us who pay attention to detail and want something extra for our car. We take care of it so it takes care of us...

It does what it promises. Its action starts essentially at speeds above 60-70 km/h. For city commuting, you won't see a huge difference, maybe none at all, except for the hydrophobicity it provides. However, for commuting outside the city, its action is very noticeable, complete journeys in the rain without any use of windshield wipers.