Stern sold me an Avengers that was best described as "half baked" at best.
JJP sold me a WoZ that shut down and started to smoke after only a few games.
Heighway sold me a FT that had to go back too.
My buddy is having some issues with his AMH.
I'd still buy a pin from any of them because they've all been great with the support.
The point is, pinball machines are tough to build perfectly.
If you can't handle some troubles, get another hobby.
I suspect that we hear my issues about Stern pins because they sell far more than anyone else.