Well since it's officially released today, I can finally say the M870 is a fucking beast. It sounds nice, it hits hard, it shoots straight and the gas system is awesome. Sent out another 8 this evening back to Canada and apparently they aren't sold out if you pick up in person, only for ordering online, wooohooo!
So when these bad-boys come to a retailer near you, check'em out. They're bad-smokin-ass.