Just got my module a few days back.
First impressions - it's usable with some glitchiness with a harmonica. Haven't tried anything else. Looking at the youtube video with guitar seems like playback is perfect. It's not quite that. Could be my settings or lack there of. The youtube video on Sonicsmith's website and the manual are quite different. Seems there are a bunch of missing features on the current firmware - .9. Bending works fine. I think the whole thing is best when mixing dry vs. wet. Wet would be a bit too glitchy for my liking. It has a charm tho.
I think there a bunch of improvements that need to be made or better communication. Maybe make a new video of just the current feature set. And take the demo video down. For example, the video has features that don't seem to exist at all. The manual seems to match what is available. Where are the extra compression settings, changing VCO type by knob, or the fact that you need the Q button turned on for pitch to track correctly? Also, the settings to manually change gain don't seem to work. I just do auto gain for levels and that works fine.
Hopefully there is a way to better tune this module in the future to remove glitches or make them less likely. Or maybe I'm doing something wrong. Is it worth $390? Not sure. The jury is not out yet.