My Experience
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The hubby-man took the morning off so we would have plenty of time to vote together. Good thing, too. There were 2 electronic voting machines and a table with corrugated cardboard shields for paper ballot voting. Most people chose the paper ballot. When we walked in the door, I saw people sitting at the table filling out ballots and a line of maybe 8 people for the electronic touch screen machines. Then my eyes took in the rest of the scene. There was a line of at least 20 people winding around the table. There were people filling out paper ballots at the table, in benches, in chairs, leaning against the wall, and a mom who was using her baby stroller to fill out her ballot.
There were at least 60 people crowded into a space not much bigger than my (admittedly large) living room. Everyone was quiet and patient while waiting for their chance to vote. Volunteers and poll workers helped voters find any available nook or cranny to vote with at least a little privacy. Even though the poll workers were clearly exhausted (at 11:30 am); they were cheerful, helpful, and they moved us along as quickly as they could. The entire process took about 35 minutes.

Hubby and I chose the touch screen machines because it prints a paper trail, and Missouri is unlikely to throw away those ballots prematurely. The machine prints your ballot so you can see what a recounter would see, and make sure that every single vote you cast is correct. The paper ballots are fed into a machine, then lord knows what happens to them.

I called my mom and asked her how rough it was at her polling place. She said they were slammed, but things were moving smoothly.