Hi, I was at best buy the other day and i noticed that they had the Zagg Invisible Shield Glass for sale, glass screen protector right off the shelf its more convenient then getting a Spigen because you have to order it, but anyway has anybody purchased it yet? if anybody has, whats the thickness of it, quality? its extremely expensive at best buy and really don't want to pay $40 for it so can't get it off of amazon yet because it'll most likely be cheaper