Yes, I've encountered several instances where I've had to replace broken kicker brackets. Luckily, they have been remade.
I don't enjoy moving system 3 games since they're so big an heavy. Some WPC games are pretty close in weight, though, and can be bears to move around too.
Quoted from PinMonk:It wasn't hard to identify and correct because virtually every one I got off a route had it blown. But the fact that the video could be blown so easily and consistently is incompatible with "Gottliebs are built like tanks" mythology.
It has a pretty solid board set (aside from that one issue) that doesn't really need any bulletproofing, has robust playfield mechanisms, good quality wiring, and a sturdy cabinet. The protection layer on the playfield wasn't great, though. And Gottlieb picked all the wrong spots to cover (or not cover) in mylar.
From my experience with picking up project games, system 3 games almost always boot and flip without needing to touch anything. Anything else...maybe 1 out 8 games I find will boot without touching anything.