Ok, I remember years ago I saw a short cartoon sketch about someone inventing a teleportation machine. He stepped though one end and appeared in a tube the other other side of the room. After his friend looked at how the machine worked, he discovered the machine would clone the person using the device which formed the information in the other tube, including all there memories, and then destroy the original in the first tube.
Anyway, if you could use a machine that could teleport you anywhere, but ultimately would destroy you and have a clone of you in its place, would you use it?