I have had my Pinch Hitter for just over two months now, and I have really enjoyed it. I was attracted to the notion of a fresh hit every bowl, and that is still my favorite aspect of the device. I get a good full roast with my temp set at 600F. It would be a great starter 'ball' vape, I think.
I can't contribute to the smart plug discussion, but I can report that the Pinch Hitter PID will power on when the ambient temperature is below 32F/0C, which is not true of all of them. For example, my Terp Hammer will not power on when ambient temp is that low, but displays an error message.