I have a friend who is notoriously hard on his guns. He had a Remington Model 11 that was left to him by an old waterfowler when he passed on. He used that gun for years, cleaning it "once a year, whether it needed it or not." Two years ago he replaced the Model 11 (he couldn't get certain parts any more) with a Stoeger 2000. He's never had a problem with it and absolutely loves the gun. He got a good one.
The difference between the Stoeger and a Benelli or a Beretta, for example, is quality control. With the Stoeger, you are more likely to have to send the gun back for repair than you will with one of the others. Doesn't mean that you won't get a flawless Stoeger, like my friend did. Nor does it mean that you won't have any issues with a Beretta. Certainly, both can happen.
The thing you want to do with any waterfowl gun is to make your decision based on a couple of factors and weigh them against each other according to your own priorities. Fit and balance should be at the top of your list. A shotgun that doesn't fit you will never shoot where you are looking. You need to go to a store and mount the gun properly and see how it comes up. You need to do this while wearing your waterfowling clothes. Buying a shotgun that came up and fit like a glove while wearing a tee shirt is going to cause issues when the north wind is howling next December and January. You want a gun that you feel comfortable with. Personally, I would love a Browning A5. Unfortunately, while the dimensions are there and the gun seems to fit, I can't get used to the hump in front of my face!
The other main consideration is the gun and manufacturer's reputation for reliability and responsibility. A perfectly fitting gun that is perfectly balanced and shoots exactly where you look is useless if it doesn't go bang every time the trigger is pulled.
Regarding this last point with respect to your original request, I like the gun. It shoulders well for me and in my limited experience (friends who own them) I've not known them to be problematic. But, if it were me, I'd be looking for a Beretta A390. You can get some pretty good deals on the used market for about the same price as the A2000. Just my opinion.
I feel slightly sorry for a man who has never patterned his gun, who has no idea how far his chosen load will retain killing penetration. But I'm extremely sorry for the ducks he shoots at beyond the killing range of his gun and load - Bob Brister