Reminds me of The Fly.... i.e. a fly getting into the transporter and the fly and the humans atoms getting mixed up along the way.
I only read the story, I never saw the film.
That's one piece of technology I probably wouldn't trust if it existed. I wouldn't trust that the human that stepped out of the transporter really was me... as in what if I died when my atoms were scrambled, and then a totally new person was formed when they were put together again... a new person with my memories in their head (because they're the result of how the neurons in the brain are assembled). But no-one would know, because they'd look and behave just like me. But I'd be dead and gone, no longer conscious. The replica of me would have a new consciousness. People would be killing themselves in this way and creating new people in their place, and no-one would know.