PDATED REVIEW:
I purchased this card making the assumption that all class 10 cards had the same read and write speed. This was a poor assumption on my part. In order for a card to qualify for class 10 speed the card needs to be certified to have 10MB/s write and read speed. Some manufacturers classify their cards at a slower speed even though they qualify for a higher class. SanDisk make some cards that would qualify for class 10 and rates them as class 6.
The product photo cheap buy -SHOPs on Amazon does not have the card's speed printed on it. The card that was shipped shows the front of the card printed with "20MB/s" which is the cards read speed. The cards write speed is 16MB/s.
I own a SanDisk Extreme III class 10 card that has (up to) 30MB/s read and write speed. My Nikon D-90 that can take advantage of the SanDisk cards speed. The difference is the SanDisk card can capture 100 photos at fine resolution in 24 seconds. The Transcend card captures 66 photos in the same time/resolution.
I reality very few people will ever have the need to drill off 100 photos in 24 seconds, but I can't stand to lose a good shot because the camera is cheap buy -SHOPs slow while writing to the card and I can't fire the shutter. You can hear this happen at about 4.5 seconds in the video review. This does not happen with the SanDisk class 10 30MB/s card.
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