Review on ZAGG InvisibleShield Ultra Clear Plus for Samsung Galaxy S20 Ultra - Case Friendly Screen Protector - Model:200204838 by April Smith

I don't know what bad reviewers are doing wrong (other than ordering the wrong size), but I've had no trouble installing this screen protector using the easy 4-step guide followed. It's not your usual cheap "put this side and stick" adhesive backing, so you might be used to it. In any case, in my opinion, it was easier with the built-in tub than with spray and adhesive protection. There were a few microbubbles but they disappeared overnight. Feels like glass which was most important to me, comparable to the original screen protector that came with the s20 ultra.