We had those in my state as well. They were awful.
First, they had a "master lever" so that people wouldn't have to think about their votes (except for the non-partisan races that people using the master lever often neglected...)
Even more egregious was that the commit action was tied to the curtain release lever, so people who needed help with something would sometimes (maybe as much as half the time...) pull that to open the curtains, ending their vote, and it was not reversible.
The final tallys had to be read from a paper tape, and I don't envy anyone trying to do a recount on miles of calculator ribbon.
Finally, they were gigantic and heavy, so we only had a few per precinct, leading to long lines everywhere.
I do not miss those machines.