Mine arrived with three of the pins bent and the two plastic endcaps on the extension arms broken. Not the end of the world, it's still perfectly useable, but they definitely need to up the amount of packing foam they use. It'll be nicer when I can lock/unlock every extension arm, but the remaining, good pins were easy enough to move to the arms I use most often.
On the plus side, I'm using this STM 1800 almost every day, I love it. It already has some drips of dried tung oil on the frame and a track saw slice through two of the top wooden supports, but I guess that goes with the territory!
I've reached out to Festool Superstore (PMC Tool) to see if they can help or whether I should be reaching out to Festool directly.