This is my setup on the 870. I have the front grip but never got around to trying it.
The pistol grip only shotgun is one of those things that you like or hate.
It kicks a bit, especially if held wrong.
It takes some practice to get good with it.
The shotgun is a close range weapon, out to 20 yards or so. If the average shooter can't hit the chest area of a BG out to 20 yards, from the hip, it's not the gun's fault.
There's at least one shooter, I've seen on the net, that shoots trap with a PGO shotgun.
I use a Streamlight TLR-2 laser/light on mine, which makes a pretty good setup.
I'm not a big shotgun fan but this setup is handy to grab when I check the neighbor's place, etc.
When people ask me about buying a PGO shotgun I tell them, "Don't".
Not many people will take the time to become competent with the gun.