From what I've heard of it (no-one carries one in my area), Roland have come VERY close to the real thing (not perfect, but with many additional capabilities to compensate). Now all I need is a smaller, lighter (and cheaper!) version.

I definitely LOVE the capability to sound like a bandoneon one minute, and a full Italian accordion the next. Now I just need a good Cajun accordion emulation, and it's Mardi Gras for me....!
An arranger is just a tool. What matters is what you build with it..!