Ok, you can get some really great sounds out of this thing but I am sure that I am not the only one, who keeps distance because the GUI is an optical mayhem. Like Matt Bianco sung: "It's more than I can bear!"
I once got two Yamaha TG77s for $400 (that's for both; you can't get one for that little now) to play around with microtonal tuning. That's all gone now but there is this wormy contraption and it's a bit of all right, like the earlier efforts. Give it a spin. Double your money back if you don't like it.