Quoted from Groo:
I've been invested in this hobby a relatively short period of time and have only bought NIB Stern machines. All 5 have worked perfectly out of the box and have had no issues. I was a little worried reading this forum and committing to a premium but am glad I stuck it out and got it. None of the issues with mechs, defects, or ball launches have shown up in 150 or so plays. This machine is awesome.
There are a couple of things you have to keep in mind when you see negative reviews of anything online.
1. There is a well documented phenomena where people are significantly more like to post negative reviews over positive ones. People with unpleasant experiences with an item are much more likely to to make noise and comment on it than people with positive interactions. This can lead to a situation where there are more negative reviews of items than positive one, even if there are, in aggregate, more positive interactions. Case in point, this is a thread specifically for people to post issues with Iron Maiden, so of course there's going to be many posts from people with issues.
2. Not every person who has an Iron Maiden table participates in this forum, so we are missing both positive and negative experiences from a chunk of the owners.
Now, that being said, things like shipping a game without is pretty big quality assurance fail, and Stern deserves some shit for it.