I've had this compact flash card for a few months now, taken hundreds of pictures with it, filled it to near capacity with images and movies from my Nikon Coolpix 4300, and haven't had any problems. I don't have any experience with other kinds of CompactFlash cards in my camera to compare the write speed of this Viking card to, but I can say it has worked flawlessly for me. Its important to keep in mind that the speed at which a digital camera can write to a card is usually limited by the internals of the camera more than the card itself, so buying an incredibly fast card may not help the camera's write speed. As with all things, its best to research this before you make a purchase.