Hello,
I advice you to buy a SCDSTWO; if you can't, i have the Acekard 2i, and i have the M3i Zero, and I think the Acekard 2i is better. The M3i Zero is too slow, and the firmware is outdated... (there is the Sakura firmware, however, I prefer a modded Moonshell 2 xD)
If you still plan to buy...