Since Christmas is around the corner I was thinking about getting an EZ FLASH OMEGA/Definitive edition, when I looked it up online I found a seller that sold around 400 of them and most comments on the order is that it took time to arrive but came fine, however, they also added that it stopped working after a week or month after receiving it, so can I know is this is a normal thing or if the seller I found is selling a knock-off replica?