the first: the lead times ... delay 2days forget that my journey from my pc to empty the card that I had before ...
the second: the speed of writing and reading !!! REALLY far from a class 10 !!! 4mb / s write and 19MB / s read ... is the equivalent of a class 4!
the third, put the card in my camera error sometimes ... I am forced to format by using the menu of the camera or put the card into a PC and format (but the photos are fortunately not lost. ..)
if not for the price ca can pass but it would make a correction on the real class ...