I have a 256 GBA Flash Linker cartridge. I found out some bugs with that cartridge such as the inability of being able to save original games in my PC, the absence or RTC (real time clock) very convenient when using a palm application, and the inability of using zip files with a rom file inside. When I found the 512 XROM I did not believe any of the things written in the description because of the low price advertised (512 MBit of space, lots of cool features for a lower price than that of a 256 MBit cartridge). I called the technician at merconnet.com and after he answered and confirmed all my doubts, I placed the order right away. The product was received three days ago and it functions as described. I am very pleased with the performance of this cartridge and I highly recommend it.