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I ordered 2 cards (8GB version). Both cards are very close in performance together
Write: 13 MB / s
Read: 15 MB / s
These cards come in a Panasonic HDC-SD66 Video Camera is used to record full HD videos and it works without any problems.
That the specified 20 MB / s read and 16MB / s write not be reached, I already expected due to the numerous comments, yet the standard class 10 is achieved.
I wanted a low-cost card for recording FullHD videos and for these cards are more than just useful! The HDC-SD66, for example, needs for FullHD "only" 17 Mbit / s which correspond not even converted 2.2 Mbyte / s. So even if you caught a bad card, as reported here in some reviews, are sufficient for FullHD recordings even these.
Because it's the cheapest card at all with 8GB capacity here at Amazon.com, you can recommend this without hesitation as saving tip.