I have two of them, and I think they are a very handy tool. I don't think they are any more dangerous than any other tool that produces concentrated fire.
When you run out of fuel, I normally use Coleman white gas, but you can fill it up with whatever is handy. I have often used kerosene.
If you are doing a big job, it is much handier and much less expensive than the small butane bottles on the Burnzomatic.
Bob


55 Cameo 396 TH 400 with overdrive
65 Caliente conv
67 BB Caliente conv
67 Mercury 1 Ton
76 GMC 3/4 ton 454ci
84 Buick Turbo Regal