FWIW, the Stoeger and Franchi inertia systems are 'similar to Benelli's', not identical.

There weren't many choices for lefties when I decided that I wanted an autoloader shotgun. I have a few thousand rounds through my SBE 1 without a hiccup. Recoil is there but can be managed with a Limbsaver pad and the correct shims. Even with the cheap, low-brass dove loads, never a jam. If I had to do it all over again, I'd get the M1. I can count the times on one hand that I've used 3.5" shells in the past seven years and could have done just as well with 3".