I've had a Whitestone Dome on my Note 9 for 3.5 years. I try to be very careful, but drops are almost inevitable. Sometime in the last year I got a fine crack in the Dome glass, but not enough to bother me. That probably would have been a cracked phone screen without the Dome glass installed. I just removed it to confirm that the phone glass is perfect (it is), as I'm trading it in for an S22 Ultra. I would like to put Dome glass on it as well, but I'm wondering if it will work with the Samsung leather case. I like the looks of that case around the camera lenses.
I've installed quite a few Whitestone Glass protectors, only messing it up once. Read the instructions carefully, watch the installation video, use a flat surface, and take your time and be careful. It requires some care, but it's not brain surgery.