I don't have one but a friend of mine does.
They are reliable, but like a lot of auto's they like some loads better than others. You can reconfigure it to have the more "AK like" grip and stock if you want. They are pretty good if you are looking for a defensive shotgun with large capacity mags.
There is an AR style 12 coming out soon. I think some places are taking pre orders. That should be an interesting gun.