The bottom line: the technology is still premature
To be clear, Comma One does not represent a doom and gloom scenario, but it also offers very little benefit and more risk than the company would have you believe. If a driver is texting, for example, or generally displaying a lack of attention to the road, then yes, Comma One is clearly a safer option. Then again, the aforementioned mountain of anecdotal evidence on YouTube suggests a very clear pattern that reliance on systems such as this truly encourages inattention -- and the Comma One doesn't even require a periodic and symbolic touching of the steering wheel to remain active.
Will the Comma One give your car an Autopilot-like system for under a grand? If you have the specific cars on which it works, yes. Is it a smart buy? Absolutely not.