Mine's been great so far other than a few random reboots attributed to an app. Also noticed that after I clear the cache partition that issue stops.
Mine has always been in a case, whether it's the Supcase Beetle holster case or the Casemate toughstand case. It's only naked when it's time to "change clothes" or to clean itThe Zagg screen protector I put on shortly after I got the phone in March has a few air bubbles showing up now. Other than that, no complaints with the phone.