it's cheap but the build quality is shitty which you will face issue like the card not recognizing the microsd that you have to reinsert it many times to get it working. slight nudges on the system and your game freeze. poorly constructed microsd slot or contacts, don't really know which one is the real cause. if you were to switch to a different game and ejected the card, maybe just a little contact with the microsd card, the next time you put it back to the game slot you have to remove it again and blow air onto the contacts or into the microsd slot, keep on reinserting until you find the right 'position' to get it properly recognized by your ds. better spend more on a more reliable one for longer-term usage. definitely not recommended to get the r4ids.cn card.