Stu pretty much summed it up. Our most recent boat came poliglowed by the previous owner when we got it a couple of years ago. I decided to remove it and buff and wax instead, at the beginning of last season. I used commercial floor stripper to remove it. It has taken 2 seasons to get the shine back the way I want it. I keep finding spots where there was still some poliglow on the boat, which I remedied by wet sanding the areas with 1000, then 1200, then 1500, and buffing from there. It looks like a new boat now (it's a "96).
Poliglow does work, especially on an older hull, to kind of revitalize it. It will never look as good as a good buff (polish) and wax, though it may be less work to poliglow it. If you're good with a buffer (or know someone who is), I can't see using it. (just my 2 cents after doing a removal job and going back to wax). If the boat is already shiny, there's no way I'd scuff it down and use poliglow.
Edit: added pic. This is NOT a poli glow shine
