I installed a Zagg Glass Fusion+ about a week ago (Extreme Hybrid Glass Screen Protection - Military-grade materials combine with the properties of glass to create powerful protection with a smooth finish. GlassFusion+ is made with tough, durable components that have been refined to a polished, glass-like surface.) The Product itself, feels just like tempered glass, the S-Pen glides very smoothly across it's surface and even if I press hard, it doesn't leave any kind of marks, so I was very happy with that. HOWEVER, my fingerprint sensor would NOT work at all, even after turning ON the "additional sensitivity" setting specifically for that reason!!! I eventually removed it, because I use Fingerprint Unlock exclusively to unlock my phone. I requested a refund - they are sending me a second protector via FedEx Ground and asking that I please try one more because they had previously tested the product with the Note 20 Ultra successfully. I said O.K.! We'll see... could have been a bad one somehow??? There were no air bubbles under it for sure - it went on very nicely and I cleaned it really well and used their instructions to the letter! ???