How good is the new android 4 OS? How is the nexus battery life? How better is it at emailing and web browsing? Eg. iPhone is super slow when typing in forums and email that is more than 1 line of text. Is it easy to load media to the phone than iPhone? Does android allow direct drag/drop copy/paste for media instead of converting to its special format, load into iTunes, create an album and then sync it? Overall is it a worthy upgrade?