This review is for the glass and not the bumper. I have not tested the glass against a hammer ;-) but others have done so independently so I trust the strength, which is why I bought it. Maybe seems a little smudgy, perhaps slightly more so than some other glasses but not as much as some either. Installation is easier, I found, than with some other products. This is real piece-of-mind stuff here and I'm overall delighted I found and got this. Works great with the new iPhone 6s 3D touch screen--it has not diminished that capability at all in my evaluation. Also, it does not distort the few of the screen at all as some products do, particularly the ones build into cases that can raise off the screen a bit. Basically, a little smudgy but great product and worth every penny.