For those who advocate a shotgun for home defense, this is not a bad concept. One reason I don't favor a scattergun or rifle for close in work is the length. Moving around in low light with furniture and doorways and the possibility the bad guy could grab your long gun in close quarters makes a pistol more practical for me.
But this thing is short enough to be used in close quarters and scattery enough to be used by someone who is not a crack shot. I think it has a niche.