Kingston microsd is perfect, no slowdowns and very good price. and also lifetime warranty
What flash cart was it used with and did you test Castlevania's intro?
yes i did test castlevania intro and it's fullspeed on supercard lite.
i only buy from local shops, they get the real microsd cards from kingston factory, so no chinese fake crap cards that are slow.
i really dont know what people have against kingston, they have better speed,price and warranty then sandisk...