Without a string of cameras being able to track a deer, they're not truthfully real time. even on immediate upload, it still takes a few minutes for my cameras to send it up. by that time especially during the rut a buck could have moved quite a bit.
I have had the Pnuma for about 6 years now. When it's cold I put on top of my base layer and when it's really cold I put directly on skin. The vest does make a huge difference.