I received my pre ordered Galaga just over a week ago, no damage from shipping, it went together great. The joystick and fire button are not as responsive as my multicade with the Arcade SD but overall its good.
A few days later I picked up Asteroids at a retail store, no damage but did have some holes that did not match up with the monitor brackets, not a big deal. I bought it for Asteroids and so far its been great. I cannot comment on the spinner as I havent played the spinner games much at all.
Today I received PAC MAN, this was shipped to my house like Galaga, one small ding in the left side panel but it went together very well. I have only played a few games on it so far but seems ok.
I have control panel protectors on order from Arcade 1up for Galaga and Asteroids, not sure if they have one for PAC MAN.
I am amazed that there isnt more damage due to the way they are packed. As far as overall longevity only time will tell.
I hope to get a lot of playtime on them over the holidays, if I have any issues I will report back.