Just updated my 620 today. So far so good. The storage check works fine,the pinch to zoom jerking issue is gone,back speaker is louder,overall menus and system seems faster and smoother more responsive. Camera flash issue is also gone and camera seems slightly faster. Also,noticed Nokia Music live tile,now has permanent photos of album covers on now which looks cool. Noticed when typing on keypad the key sounds is much louder. Can't comment on any battery improvement if there is any. Edit: still no issues so far except last night my Lumia 620 restarted and screen went blank whilst it was in idle mode. So far only once it's happened.