It is a great protective case. For the first 4-5 days, it had two spots where it had trapped air underneath and I had to press it with my finger and release the air every now and then so that it would fit well. After that, even when it got wet/worn constantly, it was as if it perfectly took the shape of the watch and the gaps disappeared, and it fit wonderfully. :)
You don't even realize it's there.

When it is turned off, bubbles appear. While at first it was perfect. One month later and it is still doing a great job

It was easy to install, okay everything at first, but it suddenly came off after 4 days (possibly came off when taking off a shirt). It's not glass but flexible plastic. Money wasted.

Maybe I rushed to criticize, since then it hasn't come off again, it has saved the screen from scratches during work. I will get a new one for replacement, in the end, it definitely wasn't money wasted. It's worth it.

It protects the watch well, but after some time it may come off, especially if it gets tangled with clothing during sudden movements. If it gets dirty with dust, you will need to replace it.

I can say that the installation was easy and without any particular problem. With careful placement, there were no bubbles and it does not affect the brightness/clarity of the screen. It slightly cuts off the edges of the screen and I think it requires a little more pressure on the touch than before. Unfortunately, on the third day after it was installed, it proved to be durable as it did not crack and protected the screen, but it came off the screen and when it fell on the floor, it got stuck and filled with dust, so it ended up being thrown away...

Update 30/3/2022: After 10 months WITHOUT the protective cover, the screen has no scratches even though I don't pay much attention. I have bumped it several times on various points and surfaces and nothing happened! Therefore, I believe that the protective cover is not necessary.