When shooting in low res or JPEG mode with a 4 or 5 MP camera especially, a fast card is not a necessity. (News photographers do not need to shoot in High Res modes. Newspapers do not need huge/ultra high res images.
But in high res capture modes (with a digital SLR camera), especially 6 MP and higher, there is a real benefit to using a faster card.
As Rob Galbraith says, << Several D60 design decisions mean that this camera will benefit from the fastest possible CompactFlash card.>>
<< The D100 has the dubious distinction of shooting the fewest RAW format frames in a burst of any currently-shipping digital SLR in this database. To return to shooting as soon as possible after the buffer fills, then, look only at the fastest cards.>>
And similar comments for other digital SLR cameras.
Depending on the camera, the Apacer card is not one of the fast ones. http://www.robgalbraith.com/bins/multi_page.asp?cid=6007
And select the camera of interest to find out which cards provide the fastest performance -- with that specific camera.