I did it a few years ago, the week before christmas. As it happens, the system resets in the new year, so I only had to do one week, and we were told not to go in on the friday. Lucky really as it was the most tedious 4 days of my entire life. I was only young too, so no one even spoke to me.
I’d imagine it’d be interesting if you got on a case early on, but as I didn’t get to see any, it was just 4 days staring at the wall.
Did get a Christmas dinner one day though.