Hi BBBB
I have been trying it out, especially since there is an iPad app. Right now I haven't found the Ipad app to be stable enough to take out on the road, but I'm sure it will be eventually.
The iPad screen is also a little small for more complicated arrangements, and I would miss the foot pedal, but these problems may be overcome as time goes on.
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Graham, Korg Pa1000, Korg G1 Air, Countryman E6, Roland BA330, 2 x Roland CM-30, , Mackie SRM150