No case or screen protector here. I've never liked the look or feel of screen protectors, and feel that with a phone as nice looking as the One it would be a shame to hide it inside a case. Of course, I'm very careful with my phones ... the last phone I used a protector or case on was an iPhone 3G, ditched the case and screen protector on that and have gone through the iPhone 3GS, iPhone 4 and iPhone 4S naked since then. The only one to get any type of scratch was the 4S, and that was with well over a year of use. I've had my One for a couple weeks now, carried in my pocket both at home and work, and so far no sign of scratching on the aluminum at all ... or the glass either for that matter, but with Gorilla Glass 2 it seems more likely that, with normal use, you'd scratch the aluminum before you would the glass.