I just bought a 4GB Micro SDHC card from Sandisk. It is only class 2 and SC speed detection said 22, but it has a random access time of only 0.8ms and read speed of about 18 MB/s. In some topics here people said, that the class is not important, because it's only the WRITE speed. I tested the card with Castlevania PoR and CoS. PoR gets the random freezes and the intro of CoS is laggy and skips frames. But all other games I tested worked fine. Now I don't know if I should keep the card, because I don't care about the Castlevanias, or if I should try to get a class 4 or 6 card (but with the risk of getting an even slower card, because the class only affects write speed). So my question is if there are any other problems (other games not working or sth totally different) with slow SD cards.