You know, initially with my 20" 590, I was getting strain in my right pinky and ring finger metacarpal area. But it wasn't from the trigger. It was from the slide release. (my first Mossberg) I've since changed my technique and its a non issue now.Have you noticed much difference in the reach to the trigger? With the factory plastic Mossberg stocks it will strain my hand after a few hours of shooting. F**k that makes me sound like a pussy! Pistol grip stocks fix that issue but make the slide release and tang safety more difficult. They're great on Mavericks but not what I want. The SGA for the 870 was a full win for me, I couldn't find one fault with it. I think I'll try the Mossberg SGA and see how it goes. I'm still thrilled to have the shotgun I've dreamed of for years!
I love my 870 SGA too, I would not say the difference in grip feel is for the worse at all. Just slightly different.
I've definitely come to prefer the SGA grip in general though.
I feel it to be a perfect hybrid of a traditional stock grip and a modern pistol grip. As a result, three of my five shotguns currently sport them, and I don't see that changing.