I can assure you that this is legit, its a SanDisk alright.
Just as advertised, class 4, unlike other sellers who put up a picture of a microsd card class 4, but is actually class 2.
EDIT: My sd card gave up on me summer of 2013. So it really lasted me a year. I lost many files, and I will probably never be able to retrieve them because the sd card is fried. Wont mount, cannot be detected with any computers/devices.