I've considered one BUT, you use it a few time then it takes up shelf/floor space when not in use and that's NOT considering the $$$ you spent to just let it sit?.
I'll go with my Propane torch and Map Gas. Map Gas burns hotter, takes less time and NO big cash outlay.
Darker room to see the color change on the brass. You're learning as you go anyway.
Kinda like popping for a Bore $cope. You've been shooting bug holes with no issues THEN, you get yourself a Bore Scope.
You look down your FAVORITE Bug Hole Shooting barrel and !! Nothing has changes till you spent those $$ on the Bore scope?
Now you're "Just asking for trouble". How can it be that my FAVORITE bug hole maker can shoot that good and look that bad?
Never should have looked!! Life is a learning experience and over the years, I've talked myself out of buying LOTS of things.