My kids both have the original Nexus 7 and are both about to go on their 3rd screen replacement. This is frustrating as only one was caused by a severe drop. At this point, we are considering a tablet upgrade rather than another $50 screen repair. Easily cracked screens seems to be a very common problem on the original Nexus 7. Has screen durability improved on the 2013 Nexus 7, or should I look to another brand?