I am interested in trying a glass screen protector for my brand new 5S but I don't know which ones are the best. There seem to be lots of different options and i would like to get some opinions from 5s owners who are actually using them. Specifically with Touch ID Is there one brand that is much better than the others? Is there something specific I should be looking for? Also does anyone have coupons codes that I might be able to use on these? Thanks!