Ignoring the possible compatibility problem with the Canon digital SLR, the Apacer Photo Steno Pro II is only slightly faster than a standard speed CF card. In our real world tests its performance falls considerably short of the claimed 100X transfer rate, even when used in a USB 2.0 card reader/writer. Everyday users of digital cameras are probably better off paying less money for a slower rated card.
Update
According to Apacer, the original Photo Steno Pro II 1GB CompactFlash Card was an engineering sample. A final production version was retested using two different USB2.0 card readers (updated graphs below). The new results do show an improvement, although its performance in our real world tests still falls short of the claimed 100X (15MB/sec) read speed and 80X (13MB/sec) write speed. The second updated graph demonsrates this.
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