I do not have any personal experience with the CycloDS, however I can tell you that you cannot pick a better flash cart than the Acekard 2i that is on the market right now. An Acekard 2i running AKAIO 1.6 RC-2 will load any ROM without any issues what so ever. This flash cart has the best compatibility with other NDS extensions, such as the ez 3in1 GBA flash cart, and has no problems loading GBA ROMs with that add on. You will not be disappointed with the Acekard 2i. miros