I bought it for my wife's Samsung Note 8, on which I had installed the Whitestone Dome glass, which had a much better installation implementation, but it was a much more expensive product. Maybe because it was, as far as I know, the first company to start this type of tempered glass with liquid adhesive and UV. It simply disappointed me in terms of support because, even though it states that it has a lifetime warranty and the user only pays for shipping (15€), when I went for the fourth time to follow this method (YES, my wife broke her Whitestone Dome four times, fortunately not the screen), they told me that they no longer support this specific mobile phone ???? and so I ended up buying the T-Max, after trying some Chinese ones first, with liquid adhesive and UV, which were TERRIBLE.

My complaints about the T-Max are 2:
1) The frame it had, to fit the phone, was clearly of lower quality than the Whitestone. Very soft and without particularly absorbent side cushions, which hold the extra liquid from flowing to the sides and back of the device, as it happened.
2) They did not provide stickers to cover the holes of the earpiece, microphone, and buttons, with the risk of adhesive getting in there and causing issues.

So I came up with my own solution using gel tape, which didn't work 100%, so there was some cleaning involved, but luckily there were no problems.

So to sum it up, T-Max is the only option for "old" phones, otherwise, if Whitestone Dome is available, buy it blindly, despite its price. I personally have it on my S21 Ultra and my old S9+