PeterLucas wrote:
>
> I've seen an ad and we're thinking about buying one.
> Are they worth it? Are they safe?

No, they're very dangerous. They're all made
by companies that you can't sue because they're
in China. Most of the people who buy them are
smokers, so the relative risk is not that high.
Do you smoke? If so, don't worry about the risk.
Just enjoy, while you can. :-)