So I stumbled across this: Too good to be true, the before and after screens are 2 different screens. I doubt the finish product will even look that nice.
Err... Really looks too good to be true. You can see that the glue isn't distributed properly due to the hydrophobic nature of the original glass screen. It pooled in streaks. So even if it's genuine, curing it will result in streaks... Also he put so much of the glue that when he used the scraper to wipe the excess away, it definitely got into the speaker and home button. The phone is likely "mute" with a non-functional home button...
"Tempered glass" screen protector is probably much easier to replace. But it is not durable at all, and definitely not "tempered".