At the risk of being a party pooper I always thought System 1's sucked big time!  Slow, clunky, ordinary sounds, lack of innovation, poor reliability.  On the plus side their displays looked cool and flippers were usually strong.  Had a soft spot for Sinbad and Joker Poker back in the day.  No desire to include one in my collection though...

cheers
Ian

I agreed until I had a ball restoring a Genie. The game was partially working before I started it, and I though it was slow and boring. I could make a coffee while waiting for the ball to travel the length of the field. After I finished it, I changed my mind about system1 machines. They were never (and will never be) as good as Bally, Williams and Sterns from the era.. If you like EMs, you will like System1s. Gottlieb were a bit too slow in converting their pins to Solid State.

Now I have a new appreciation for system1s.. I still think there are bad titles, but there's more good than bad.