Obviously one of the problems everyone notices on the N4 is the fragile back of the phone (from what I hear). But with a case such as this one (Amazon.com: Acase Superleggera Pro Hybrid dual layer Case for LG Google Nexus 4 (Nexus 4, Black): Cell Phones & Accessories) or any gel/hardcase one in general. Should I still be worried about breaking the phone? I mean I will still be cautious, but does anyone have any experience with it still breaking in that type of case?