I have very limited experience in the pinball world. I've been a proud owner of a FT for little over a year and recently got a STTNG. The Fish Tales had a few issues with reel motor and loose bulb sockets in the beginning. There was also an issue with me shortening out the switch matrix, but i guess it dosen't count. After that was sorted out, i only do cleaning, ball and rubber change. the thing just refuses to break down.
The STTNG has been working with no issues since may?!? it has a bad reputation but i have a stable machine for now at least.