1111 is right. Speaking of that, the R4 is the best overall Slot One card that you can buy right now. If I were to recommend one, it would be that and N-Card. That being said.
The N-Card simply runs games more efficently then the R4, the R4 is dependent on your microSD. If the R4 had built in memory, it would run all games perfectly as well. I have a M3 Simply (R4 Clone) right here, and Castlevania PoR freezes, Jump Ulitmate Stars slows done abit when the action gets going tough, and Tony Hawk Downhill Jam has slowdowns.
I know you guys want to justify your purchase, but being ignorant isn't going to help. Speaking of purchase, I might have to get a R4 for the action replay functionality if it doesn't come to the M3 Simply.
im sure it will come to the m3simply