This question comes up pretty often. And, while it is a question of reliability, it isn't as bad or as good as popular opinion. Stoeger has been an importer for a very long time. Way back when, they imported some very high quality guns. But, somewhere along the line they followed the lead of the other importers and went to manufacturers and had guns built specifically for them to a certain price point. That price point was usually pretty low, so something had to give. That something was quality control.
The M3000/M3500 guns are a perfect example. The guns are built on the Beneli design, but machining tolerances are somewhat stretch. The fit and finish is also necessarily sub par. What does all this mean to the average consumer? Mostly very little, until something breaks. The average guy wants the gun to go bang when he pulls the trigger, recycle another round and that's about it. The majority of these guns will not experience any problems in that shooter's lifetime. But because of the corners cut, there will be a much higher number of breakdowns than in the basically same Beneli. Of course, they cost a whole lot less, too, but reliability comes at a price.
Like mudpack said, you pays your money and you takes your chances.
I feel slightly sorry for a man who has never patterned his gun, who has no idea how far his chosen load will retain killing penetration. But I'm extremely sorry for the ducks he shoots at beyond the killing range of his gun and load - Bob Brister