Any VSTi demo will show what the MS is capable of sounding like. After all, it is essentially a computer in a keyboard case, so what the VSTi demo sounds like will be what the MS sounds like when running it. The problem about the MS was with its use AS AN ARRANGER, where the ENTIRE soundset is integral to whether it works well or not. Few of us have the skill-set to put one together that works as seamlessly as the best factory ones.
Personally, I still think to nail a Hammond performance, you also need waterfall, light action keys and a swell pedal with a decent throw. Part of the SOUND was the things you could do with that action. One of the things I am still in love with on my G70 is the rounded off keys. While not waterfall, there are no sharp edges to catch your hands on while you do palm smears and glisses.
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An arranger is just a tool. What matters is what you build with it..!