I received my Jewelbots yesterday (yay!), and when I plugged it in, nothing happened. So I hit the button, and it came on.
So there are two issues:
The out of the box guide doesn't include the "press the magic button to turn it on and then plug it in to charge", and two:
When it's "off", it does not have an indicator if you plug it in, and the firmware should probably be modified to initiate charging and the correct indicator when you plug it in, so no matter what a user would see something when they plug it in.