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.