It works. I've done it, although only a handful of times. The (Iowa) boys at MoJam used my machine for at least 2 of the years I attended. I think I left it for them one year, I haven't seen it around the shop. It's not nearly as practical as a heat gun or steam. It's hard to control, I think because it's effectiveness is a function of the moisture content in the wood, which is hard to predict. Also it's tricky to position the wood and it only heats a relatively small area. Also, as with steam, you have to get the wood to a caul really quickly. Heat gun and a caul is absolutely the best, cheapest way to work with bow wood.
I have colon cancer. I personally don't think the two are related. Google sources aren't conclusive wrt to the potential link. I can see no incentive to try it.