I haven't had a freeze yet on it, I have a san disk 1 gig, and then bought this for 15 bucks, and am soooooo happy I did. I was so pleased that I have bought 3 more now (one for me, one for my friend, and one for my mom's r4 (I am 19 btw!)).
in all honesty, if you got 15 bucks, buy one from new egg, if not, get 15 bucks! (that includes shipping btw)