Peter in my opinion, the MD-2 is useless..Two[or three] wrongs don't make it right...

Roland already has the best method[intelligent mode], it plays correct in one or two fingers[musically correct fingering] or full 3 or 4 even 5 note chords..If you screw up and miss a third or fifth,it compensates for your error..

The flagship keyboards from Roland also include the "standard"[must play full 3 note chord to be totally correct, although it won't be devastating to the ear], and "piano style"[will not read a chord change untill a mininum of 3 note chords are played]...

These three methods are all anyone needs...That comforming [to other manufacturers system] playing mode is Mickey Mouse..