Ordered because of the many very good reviews and the low price me this SD card. Unfortunately, I must add my voice to the bad reviews on here but. The map was broken on holiday after about 150 images and could no longer be read by my EOS 650D. Is of course very annoying, especially when something like this happens on vacation. The assumption that the SD card is defective, then confirmed to me after the holiday the tool "H2testw". (If anyone have similar problems: With the tool "PhotoRec" could be with me save at least a few more photos.)
Conclusion: In most cases, seems the SD card to function properly. Will they still can not order me again because my risk of data loss but is too high.