the interface is rather easy to move around, with only a handful of sliders.. i like this- its ugly but functional.
i liked the decay/release and hardness factors you can apply to the sound.. it has enough features to really mold what you want..
however the sound, well it sounds like a piano- but IMO it doesnt really have a lot of character to it.. it sounds very thin and tiny to me.
i normally use, instead.. a small, free soundfont in place of this piano (converted from an impulse tracker multisampled instrument which was sampled from an alesis synth). Nothing is as good as the real thing, but i have free soundfonts that (to me) sound much better than this vsti.
i would say, since its free, no one has anything to lose by trying mda piano, but it just doesnt fit the bill for me..
different strokes for different folks, i guess.. :)