Fun for a quick bash. Wouldn't want to live with one though.
Gottlieb System 3's are very reliable. The "smart switches" can be a little iffy at times, and are probably best retro fitted with regular switches.
Interesting thoughts - what works against the long-term playability?
FUN game - but that's about it. Play it once a week maybe ? Has a helicopter toy that picks up the ball and transports it to another part of the playfield. Longevity ? - Not that long !
Price - You could get two System 3's in reasonable condition for that price.