I was wondering if I should buy the Spigen glas TR screen protector on Amazon. It costs almost half as much as it does from the company website. A lot of reviewers on Amazon have stated that they are having issues with the fingerprint reader, after installation. Is Amazon selling genuine Spigen products? I don't really want to waste the money to buy a couple of screen protectors from Amazon and a couple from Spigen to compare. I don't want to have to end up buying from Spigen, if there are issues with the ones from Amazon.