At 1996 I was owning and using one made by Portasol.
It was somewhat useful mostly for electrical work over boats, the gas was escaping slowly and you did have to always check it before getting away with it.
The temperature in the tip it was always higher than needed, and this had an negative impact in the quality of your soldering.
The adjustment of temperature looked as working in the blind, by adjusting it about there, you were wasting lots of time in the job just to prepare it.
If the electrical is capable to offer more control when you do soldering, probably it worth trying it.
The flamethrower it can not get in, in very tight spaces, or touch anything else than wires.