Well, I have only shot the new RIA hammer double a few times; it has just been too hot for much more than function testing with daily highs very near 110 and typically 90 by 9 a.m.
As far as I could tell shooting 000 buck at a 25-yard gong, the barrels appear to be reasonably well regulated; pattern tests will confirm.
My example -- in 12 gauge with 24-inch barrels, weighs 6 pounds, 14 ounces. The hammers are reasonably easy to cock, and the triggers are relatively crisp and light -- 3 pounds 15 ounces right barrel, 4 pounds 1 ounce left.
Many of the reviews I read described this as an ejector gun, which of course CAS shooters object to. Maybe RIA listened, as my double is fitted with extractors.
Lockup is very positive and breaking open the shotgun is not nearly as stiff as most new doubles.
A nice feature is that you can cock both hammers, then apply the sliding tang safety to lock them up, handy if you are walking up on your bird dog acting very birdy.
So it is still early days with my example, but it strikes me as a lot of shotgun for the dollar.