It's a great phone, I'm very clumsy with it and it gets thrown around a lot, much of the paint has been stripped off the corners from dropping it on concrete and such, and nothing has ever happened functionally until I jammed a hood shock into it with... significant force and the screen spiderwebbed. Phone still works fine.
I think pretty much everyone has shattered an iPhone at some point or another, even with a case on. I have no clue why they made the back glass, that's just ridiculous.