I gave it a go with the standalone trial version. Need to do more fiddling to see if I can get something I can use. Mainly I wanted to do piano. It turned into a mess, haha. My playing isn't very precise to begin with, so that's probably the biggest factor. I couldn't get a balance point on the gate where it would deaden ghost notes and overtones, while allowing my higher strings or lower velocities to be heard. Next I'll try going through the Axe first, so I can do more corrective processing before feeding it to the app (this last time I just plugged straight into my audio interface).
Polyphonic strings were a little better (I think I used a Cakewalk VST), but again it's still hard to find a gate balance that lets lower velocities or higher strings be heard. I'll fiddle around (pun hah) with mono next.
The synth sounds were much more forgiving for my sloppiness. But I already have an SY-300 for such things, so that's not a factor.
Drums were a blast. Mindless fun, but too comical for me to really focus on trying to get something useful. Ultimately this aspect will be more of an amusement for band practice than for getting any actual work done.
Overall it seems good. I loves me some pitch to MIDI, but obviously my sloppiness is the limiting factor here. If this came out a long time ago before I got my SY-300, I might be more eager to buy it just for the synth. I'll have to fiddle with it more. To be continued.