Because I have bought 2, I have a fairly strong opinion.
It is bad but I haven't found anything better, initially out of the 4 I have tried, the first 2 went off easily, they formed bubbles, the 4th one turned out quite good.
After getting tired on the 3rd attempt, I said I will live with the bubble as I did. Today I noticed that my screen is more beautiful and responsive than usual. To my surprise, the protection had come off (I never put it in water to say that it came off), I don't know how many days it has been like this without me noticing, but I acquired 2 micro scratches on the regular screen, which was what I was trying to avoid due to OCD.
Today I put on the 4th glass and I can say it was the best application so far, it didn't form bubbles and nothing is visible, but what can I do when now I know that it can come off at any moment, I wouldn't buy it again and since I have already experienced the baptism of fire, maybe I won't put anything on again.

update: 16/11/2022 it formed bubbles on its own (without getting in water, most likely due to the charger's heat). I wouldn't buy it again after all.

Negatives:
- It significantly affects the screen's response, you have to press 1-2 times more.
- It hides the edges and some watch faces that you find after the AW 7.
- From what it seems, it comes off on its own, probably when changing a shirt (it has edges that catch).
- The application is easy but the application WITHOUT bubbles is difficult.
- I'm sure that if you get it in water, it will come off or gather moisture underneath.

I don't know if I could recommend it.

Let's not kid ourselves, it's obvious that glass is different from silicone. The truth is that it fits very well, protecting the entire screen to the point where you can't see it with the naked eye. You have to place your finger exactly on the edge of the glass and the case to realize that something is on the watch; otherwise, you won't notice anything. Unfortunately, it loses a bit in touch sensitivity. Where it used to respond with just one touch on the screen, now sometimes it requires a second or third touch. But unfortunately, that's how it is - you lose something, you gain something. However, I preferred it over the case that goes all the way in with the case because water would get in and bother me. Unfortunately, it is a necessary accessory for the watch because if the glass breaks, you are faced with the dilemma of whether to repair it or buy a new one, and since money is usually scarce, I would recommend it, wanting or not, just to have some peace of mind. Now, as for screen protection from drops or impacts, I hope I never find out. I will come back for any updates.