I was part of a group of outdoor writers that put the Cynergy through its paces before it was available to the public. These were 12ga guns only. We shot both targets and pheasants in SD, in pretty cold weather. In some cases, the 2nd barrel would not fire. However, we were all wearing gloves, and some of that may have been the glove catching on the trigger. We did have ejection problems, which Browning fixed by polishing the chambers a bit better.
Since then, I had one of the 28ga Feathers as a field test gun. Put quite a few rounds through it (all at targets), without the slightest problem. And I hit skeet birds very well with it, in spite of the gun's light weight (5 3/4#, with 28" barrels). Thought about buying it, but I can't get myself past the looks. Guess I'm more of a traditionalist.