first off i got mine at wal-mart but i'm considering the 64GB version as of now but the 16GB card i have is really fast i've actually transferred all i can to it from my Galaxy SIII because for what ever reason it reads of the card faster than it does from the phones internal 16GB of memory?!?!? i've always used snadisk stuff everything from flash drives, sd cards, and now even a SSD! they make great stuff