i have a mk2... i ****ing love it. but at times its a bit of a love / hate relationship.
straight out of the box, its can sound very 'machinedrummy' which i would describe as thin, clinky clanky, dry.... its hard to explain but you'd know the sound a mile away. but once you start to get to grips with the sequencer, paramater locks etc, you can totally bend that shit beyond recognition. which is what i love to do. the power lies in the sequencer and using it creatively. it is however, quite possible to get a nice overall sound from the dry hits. it just needs a little more attention than other classic drum machines like the roland series or jomox xbase or something.

what else..... on the kick drum front things can be frustrating. BUT what keeps motivated is that i have achieved some great kick/low ends/ooomph from it before, so it is very possible. i found that you can improve the power by using the separate mono outs.

the sampler is kinda weird too....but great. i get crazy sounds from loading alll kinds of stuff in there.

all in all the MD is not without some faults but they all kinda add up to the magic of a super machine. if your sound is 'classic' drums it might not be for you, but if you are into fukkin shit up... its yer only man