I haven’t shot the M9A3 yet, but I suspect it’s a fine pistol. I prefer the standard 92fs grip and don’t need a threaded barrel. People will point out the same flaws in the A3 that they claim exist in the standard M9 and 92fs. Most people who see flaws in the design either don’t want to learn the gun or are parroting what they’ve heard elsewhere and have already disregarded the platform.
I’ve said it before and I’ll say it again here: In the last 25+ years I’ve owned or been issued approximately equal numbers of Beretta 92 series and Glock pistols. I don’t count rounds, but suspect I’ve fired about an equal number of rounds from each platform, they are the two platforms with which I am most familiar. If I knew today was the day I was going to rely on a pistol to get me home, I would grab one of my well-maintained Berettas to take to work. It’s been my experience that the 92 series is the most reliable combat pistol available off the shelf. It’s heavier than a full-size polymer gun (by a whole 8-10 ounces... think weight of a loaded mag). It’s harder to master the DA trigger than a striker. It does require a little more oil, especially when new. But you don’t hear of people “limp-wristing” the Beretta. Nor has the term “Beretta leg” made it into the vernacular.