Very reliable product as long as it is applied correctly, it does what it promises. In my opinion, it is preferable to buy it directly from a physical store because the packaging is not well sealed and the couriers mishandle it, causing some quantity to be lost during transport.
From 80km/h and above, you don't need wipers in light rain. I repeat that it must be applied correctly for perfect results.

ESSENTIAL IN ALL WINDOWS for rainy areas and especially on trips. It may seem a bit strange at night but it's better with it. I have been using it for years, usually needs to be applied once or twice a year. I have also stopped using soap on the wipers to avoid possibly removing it.

Amazing product. It literally saved me! It requires a bit of attention so that the glass is very well cleaned and very well dried. Finally, the application should be done in suitable temperature and humidity conditions. For example, 15-25°C and humidity at most 70%. That is, midday for application

Promising, but in practice it wasn't the best.

It was applied to the windows of 3 different cars and indeed at higher speeds it removed the water. It lasted a reasonable amount of time.

Its biggest downside is that on dark roads with the lights on the windshield it creates extreme glare and is borderline dangerous.

I don't see any reason for someone in Greece to buy it.

On the shower door, it had mediocre results and quite a bit of glare!

I have the impression that it does not perform the same as the old Rain-X I tried several years ago. Of course, I may not have applied it correctly. Anyway, for the money, it's good

Actually we use it for the glass of the bath
Good solution for that. No stain remains after bath. It's repels the droplets ell but the effect go away after a while so needs to be re-applied. I think it will be more effective on the car windshield but I don't know if we can use whipers or not! I think it works also on the headlights to repels mody water and splashes.