Quite an interesting device. But sounds a little too good to be true for $179? It'd be great to have clinical trials and also qualified people (doctors, diabetic users etc.) to review it and compare with other devices
If there is no potential for harm (like with medications), throw it out there and see what happens. The market will validate the technology, one way or another.
Yes, you shouldn't trust such a device completely. But if you can't trust it... What's the point, other than an expensive cool toy?
Edit: the article the person above linked to includes exactly that
> When the first GoBe band was released in 2014, it was the target of some harsh criticism. The medical blog The Doctor Weighs In, for example, made this call based on Healbe's marketing pitch [...]