Well i watched videos on youtube and i read reviews on what people have said about the R4i Upgrade. I bought the Red Card $28 shipped and already had an 8gb PNY SDHC microsd card $24.99. www.r4i-sdhc.com As of right now i have a DSLite (US). Its been about a week and no problems. I have 74 games on it right now and so far its been flawless with all of the games ive tried. This coming Friday i will be buying a new DSi (US) and will see how it performs. I'll report back when i try this out. But, i will say if this help's at all. Watch these videos. Its a few people using the Same Chip and working just fine on their DSi. This kid is REALLY REALLY ANNOYING!!! but, his also works on the DSi Works Yet Again!!