I've owned. shot and hunted with all three types of sights. For slug use past 15 yards, I need some sort of rear sight as I tend to lift my head in dynamic situations.
For home defense, the bead works fine, for me. If for some bizzare reason I had to move outside (adding distance), I'd want some sort of sight system where I have a rear sight.
If I was LE, the ghost rings would be much more important to increase my flexibility for target engagement.
FWIW, I've played with my Scattergun Tech 870 at 200 yards. I've seen it in print that a slug is inaccurate at 2ooy. My gun with Remington slugs will put them in a 2 foot circle at that distance.
One thing I've noted with several different shotgguns is that slugs and buckshot often do not have the same POI/POA. Sights do give me the ability to zero the SG. Beads, you have to run what ya brung. Or shim your stock.....
