I have been using screen protectors on every smart phone I have ever had, dating back to 2003, and as I have installed over a dozen glass screen protectors on my Note 3 and Note 8 prior to this (they really DO save your screen from cracking when you have a good one and I am proof of that.). I have mostly used Zagg for their glass before, even with the curved screen on the Note 8, and never had a problem with the side adhesion. But they don’t make a glass version for the Note 20 ultra that seems viable, and I have read reviews that led me to try the amFilm Glass Screen Protector with the liquid installation for the glass screen. I was apprehensive about going the liquid adhesive route, and my worst fears were confirmed.The amFilm was the WORST install experience, worst process, and worst product I have ever used, and I caution anyone to beware. I know there are people who like it, and I applaud those who survive the trek, but I am tech savvy, not faint of heart, and I was defeated by this product.First The install video and instructions—they go merrily on their way but don’t provide you with any tips about what to do if you install has a glitch—how to remedy it or go back. That was a real problem for me when it didn’t go according to plan, and there was no place to get an answer. i.e. what to do if you get bubbles in the middle or areas just won't dry out, or if the screen moves and partially covers the front camera.I followed the directions exactly but had a dime sized bubble in the middle that I couldn't move. Ididn't want to cure it like that because then I assumed it would be stuck, (again no documentation or help menu to tell me. I was really unhappy about that. More later), so I had to peel up from a corner about halfway, then let it reseal itself. The liquid was still there so I had to tried to 'squeegee" it out with a tool I have. Didn't get it all out.Unlike on a typical screen install where you can get those bubbles out, this is different, and it left big bubbles in each corner, and the protector also slid up to rest halfway over the camera opening which affected the picture, despite what their FAQ said.In the process of all of this the plastic guide you use for the install also broke.I wanted to call a help line but they don’t have one, just an email support address, not helpful when you need help right away. So I called Amazon and there solution was for me to return it and they would give me a refund. So I peeled the crappy installation off and was going to bring it to a drop off location.But then I figured, hey, there are two screens, let me look for a better YouTube video and try again. I found a much more user friendly YouTube video with instructions, and it looked like it would have worked, but then UV light crapped out. It came on briefly for a few seconds, then went off, did that a few intermittent times, then nothing. And without the UV light you can’t cure the glue and it is a disaster.Again I scoured the TechMatte’s website and the internet for help about other ways to cure the glue, other alternatives I might find for the UV light at 8 pm at night. Finally I went to Home Depot and bought two UV light devices to see if they might work (both types of sanitizers), but they did nothing. So I ended up taking the phone out of the holder and of course it was squishy and bubbled, and I had to peel it off and clean the goop off my screen. Fortunately I was able to get it off.The only response I got from TechMatte was to ask me for my order number from Amazon. Nothing after that despite multiple emails from me.So user beware. I have never written such a scathing review of a product before, but I am compelled to share my experience with those who are looking for an honest response. If I could give this a 0 I would.