Mine has been close to 100% reliable except for some American Eagle duds I had once.
I have 20 round promags (6 or 8) that have been great with mine. I have a quad rail with light and Vertical grip that makes it a fine little home SD firearm. I would have no problem using mine for HD.
It's also been solid with winchester PDX +p 9mm (the only HP's I've tried)
I wouldn't know about inside but outside you can shoot this thing without ear plugs. I know because my son used it to take his first deer when he was 5.
That being said, it's in the safe and my 500 is beside the bed.
There's only one...