My opinion?

IMO they are probably the strongest of the pommie side-by-sides (referring to the long-bar waterfowl and pigeon-style guns, not the short-bar game-guns).

The side-safety takes some getting used to. My .577 conversion has a 'rib' brazed onto the button to give a positive grip even when the thumb is slippery with sweat, blood, insect repellent etc.

Despite never actually intending to acquire an Empire Greener, I have ended up owning three! One is the .577 Light Nitro conversion on an E-17 action, which is one of my favourite hunting doubles and a real 'fun-gun' at the range. One is a fairly original E-17, and the third is an E-12 grade gun bought cheap at auction because it had an 'accident' and 2-inches had been lopped off the barrels, ie no chokes, or true cylinder-bore. It is my daily water-fowler on the local hunting reserves where steel shot is mandatory.

The only down-side would be the potential difficulty of making a new main-spring if one ever broke: they double as the cocking rods.

So yeah! I guess I like 'Empire' Greeners. They kinda grow on you!