A couple things that I don't like:
1. It's a Diebold machine (not a stellar reputation)
2. I have no clue what happens if I disagree with the printed ballot since it's all internal
3. One year the paper roll was jammed in the machine. I told the poll workers but they didn't seem to care. Who knows how many paper ballots were printed on top of each other...
I don't like the machines. Eventually we'll get one that is trustworthy.. but not until capitalism has run its course.