I am mostly indifferent regarding WMS vs. STERN (or DE for that matter). The only mfg. that I would sneer at is late model Gottliebs. But I'd probably still play them anyway.
Far more important to me is that the game is working reasonably well and the glass is cleaned once in awhile. A switch or bulb out here or there never bothers me.
The other thing is light. Far too many locations I've encountered are too dark where they put the games. Either find brighter GI lights or put a clip/work light hanging nearby connected to the same surge strip. A low watt bulb is fine, 25 - 40 watts is plenty.
The condition of the legs and cabinet mean nothing to me. And if you have multiple games, you won't be able to see most of that artwork anyway.