Well, my wife's is still working after all this time...and I learned the hard way.
We were having some quality flashlight nerd time on Halloween. My friend was showing us some of his lights. His wife proceeds to show us a taser she just bought. So then my wife chimes in...how about a flashlight and taser?
She pulls her out of her purse, turns on the light and then uses the taser a few times. So then she says "Its even got a safety to turn the taser off!"
My wife presses it against my arm and then goes on to zap me, thinking she actually turned it off. Nope, she didnt.
It felt like I stuck my finger in an electrical socket. I probably jumped a good 3 feet out of my chair. Left a nice circular bite mark looking burn as well.
So yeah, this thing does work and it's not very pleasant.