Greaser I have no experience with those. I've always stayed with traditional shotgun designs: Benelli M1 Super 90 / M2 Field / M2 Tactical, Remington 870 / 11-87, etc.
Is it reliable? What time of drum or mag does it use?
It has been for me, I use it with low brass bird shot for clays and high brass buck for HD its never hiccuped. Internally it is a Winchester 1100. It uses 5 or 10 round stick mags although there is a company making a 23 round banana mag now. It looks ridiculous but I find myself wanting one. Lol