I've owned a Maxus for two years now and couldn't be happier with this gun. I've shot every type of shell possible through it with no issues from 3.5" to light skeet loads. This gun really shines with the 3.5" rounds when duck hunting. We all know solid footing is needed for a smooth swing and follow through shots. I've made kills with this gun in some very ackward positions with it never pushing me out of position on the bird.
I like to keep my guns clean as well. This is necessary due to the saltwater environment in which I hunt. I just can't see spending this kind of money on a gun and not maintain it. This is very true when it comes to the choke tube area of the barrel. Whenever a friend has cycling problems, the first question I ask is when was the last time you cleaned it? You know the answer.
Browning customer service has been amazing in my opinion. They back what they sell, I've never had an arguement with them and they have responds quickly to my needs, which have been few. This is why I have five Browning shotguns in my locker.
The overbore feature does drop some FPS but, it is not noticable in hunting situations. It does improve pattern performance which is key to me. I hunt with shells that run 1300-1400 FPS reguarly and have never had a problem. Steel shot at ranges over 40 yards does not kill reliably. Different brands of ammo perform differently and the bottom line is you get what you pay for. Hevi-Shot has always been a reliable performer for those long range situations. You can kill cleanly with one shot or use a cheaper brand and water swat multiple times to kill the bird. In the end, it works out to be the same money. Nothing is better than shooting one time and watching the bird fold, cleanly killed. Well, maybe multiple shots and multiple clean kills.