I got two of these 10 class cards as the price is very acceptable although it's always a bit of a risk to buy something without reviews or comments.
My tests:
Copied about 10 times full capacity movies from the card to disk and back to the card and they were fine. To download almost 8GB of data takes approx 7.5 minutes. Upload takes about 11.5 minutes. I used MacBookPro 17" from 2011 with 250GB SSD disk, USB2.
Also, have erased both cards using disk utility with 7-Pass erase * (it writes data seven times on every memory block thereby testing each thoroughly) and got no errors.
The casing appears to be well made i.e. glued and sealed properly. Write protection slider feels solid too. Though, we'll see how long these cards will last for on my 12 months trip starting this November.
The delivery time was acceptable and cards packaged sufficiently to secure them.
I intend to buy three more and will drop a note if anything goes wrong.
* "7-Pass Erase - this option takes times longer than "Zero Out Data" and meets the US Department of Defense (DOD) 5220-22 M standard for securely erasing magnetic media. It erases information used to access your files and writes over the data 7 times."