I have an older version of it that I have actually used a lot, even "professionally" when I had my shop we used it for a lot of brackets, wheels, valve covers etc. I just set it back up again to do some small stuff and its kicking out extra powder now and then, but that could be the fault of my regulator or the fact that I didn't clean it before I put it away years ago, and still didn't clean it before i tried it out recently lol.
Not sure how much you have looked into powder coating but you do need an oven used only for powder coating to do it. When I had my shop I grabbed a home oven from a buddy that was remodeling his house at the time. Since space is a bit more cramped in my current place I've been reduced to a toast r oven, but still awesome for brackets.