I've used Zagg since 2008. I've been mostly satisfied with them until recently. I am extremely disappointed with the protectors I've gotten for my iPhone 5. I got my phone on release day and have been through 4 sets already and I'm fed up. I've been eyeing the Spigen GLAS.tR. I've seen around the forums mostly positive reviews, except the thickness. Does the thickness prevent the use of most bumper cases?