I know a guy that uses that to do parts for his old Chevies. He says it works remarkably well, but you need to use an old oven either outside or in an open garage. DON'T use your kitchen oven. It stinks up the house really bad, and I think the fumes are toxic.
Works pretty well. Not as tough as industrial in my opinion but still a good option for at home use. you can do parts as big as the oven you have. My valve covers still look good after 2 years but the oil pan was to big to fit into the oven.
And definetly dont use your home oven. We had a neighbor that was remodeling so we got their old 1970s oven for free. perfect for garage use.
i'm contemplating one of these too. i'm thinking of building an oven out of bricks (or maybe cinderblocks) and putting an old ovens heating element and range burners inside.
anyone know a site for do it yourself kilns or brick ovens?