i've had no problems with the one for review and it was one of the first 50 built, all of which have a crappy shell and a crooked msd slot. what problems did you have?
the ak2i, r4i gold 3ds, and scds2 all work on the 3ds. of the 3 the r4i gold is probably the best buy as it supports the wood firmware and has an excellent build. acekard and akaio is a great combination but the ak2i has a really bad build quality. i've had problems with a few of mine, though they are problems that can be fixed with the paper trick. the scds2 would cost more than the r4i gold but it has more software features (gba emulator, snes emulator, ebook reader, music/video player, slow-motion, fuzzy cheat finder, real time save, etc). the ismart premium also has 3ds support, i’m not sure about the ismart mm. the ismartmm is actually the iplayer and while sold by ismart it is supported by supercard, it would be one to consider if it has 3ds support.
-another world