I really liked this. Mostly it was pretty straightforward, but the filing rules progressively get more complicated.
One thing I didn't understand was how to distinguish between the two music boxes in the registry. I got a mid-game case wrong when I quarantined a music box because I thought it was the one that had the symbol of a circle with a line through it, which was supposed to be quarantined regardless of status, but apparently it was the other one?