We have one of these machines.
only issue we have seen so far is the plastic near Herman Munster toy (part # 830-1018-19)... it has a long "tail" of plastic allong the left side that can get banged by the ball and snap off. Stern left it flapping in the breeze. I ended up cutting a sheet of lexan to match the part... but left it a liitle wide along that edge to help protect it. hopefully stern fixes this and puts a post or something, cause the rail doesn't cut it...and if the part snaps off, there is an opto left exposed that can also get broken off/shorted out.