I've shot a Benelli Montefeltro a lot. I really liked it when I shot it, and have never had any problems with it cycling anything, from 7/8 oz light target loads to heavier 1 1/4 oz hunting loads. Nothing to adjust, and it has been flawless through many thousands of shells. At some point a couple years ago, my wife decided it was hers.
Some time after that, I got a Beretta 391. I like it, although recently I've had a number of problems feeding some of the cheaper value-pack Winchester and Federal shells. It functions perfectly with Remington STS and Winchester AA target shells, and my reloads using those shells.
A couple weeks ago, I lent the Benelli to a friend and we shot some sporting clays, 5-stand and Crazy Quail. After putting a couple hundred shells through the Beretta, I tried one round of CQ (10 targets) with the Benelli.
WOW!
It was quite a difference. When I was shooting the Benelli all the time, the recoil didn't seem bad. Now that I've gotten accustomed to the gas-system, the inertia-system felt horrid. I'm not convinced it had much more recoil (if any), but it was sharper with almost a two-stage feel. In contrast, the Beretta simply has a single smooth push.
I still like the Benelli (especially the ease of maintenance), but for shooting high volume, I'd probably have to give the nod to the 391.