Mine arrived today.
Unfortunately, it kept complaining about “Sensor init fails” every time I turned it on or attempted to run the firmware updater.
The C3 key was playing an E note until I “restarted” (turned off, then back on) the Osmose twice. Then it was playing C, but the buggy behavior shifted to the E3 key, which started playing E an octave up.
The very first time I turned on the Osmose, I had the quick start guide sitting on top of the keyboard. I made sure nothing was on the keyboard when I restarted it.
I then restarted it again with the USB cable unplugged and attempted to run the firmware updater. It again failed with the complaint about the sensors and this time I got no sound at all from the Osmose.
Submitted a support ticket and boxed it up just in case they say “yeah it’s a hardware defect, send it back”