I have a dstwo on the way and im looking for a memory card. I have been looking at some 16gb micro sdhc cards when I came across what class it was * Class 0 cards do not specify performance, which includes all legacy cards prior to class specifications. * Class 2, 2 MB/s, slowest for SDHC cards. * Class 4, 4 MB/s. * Class 6, 6 MB/s. * Class 10, 10 MB/s. The class system is simple to understand, with those speeds being minimums. What I dont know, is whether it would affect performance on the dstwo supercard. I mean games might be ok depending on the game but surely this wouldnt make much difference to get a class 2 as opposed to a class 10 for example.