That'd be me.
"Despise" is a strong word for how I feel about the gun, "strongly dislike" would probably describe it better, but it doesn't really stem from anything related to function or ergonomics, of which I try not to be too particular about anyways. I think the mark of a good shooter is adaptability and I've always tried to incorporate that into my own skillset.
There are a few mechanical features I really dislike like the magazine disconnect safety, which at the College, was described in the curriculum as a great safety feature. I view it as just one more thing that will make my gun not function if I need it to. The bore axis is pretty high (which it kind of needs to be because they still teach that stupid fucking C-clamp grip) but muzzle flip is negated by the rotating barrel design, it is a pretty soft shooter.
What really bothers me is what it represents; that the right dick was sucked and we were stuck with a commercial failure of a pistol. In my mind, a good LE duty pistol should have several key elements: a high degree of "idiot-proof-ness" and by that, I don't mean heavy triggers for poorly trained and trigger happy officers. I mean it shouldn't be so prone to limp-wrist malfunctions, which it is, especially considering level of training. Rotating breech locks look good on paper and tame quite a bit of recoil, but you can't tell me all those lugs contacting the slide rails is less problematic than a conventional tilting breech lock. I think Beretta just wanted to be different for the sake of being different. I also think that LE agencies should gravitate towards commercially successful designs, which the Px4 is not. This means poor support; there are a grand total of two gunsmiths in all of Canada, who are qualified to detail strip and service the pistol beyond a basic field strip, where as certified Glock armourers are a dime a dozen. It doesn't help that the design is more complicated and has more small parts than a common striker fired, polymer pistol design.
Functionally, for me, it works fine. I do have to adjust when I practice with my privately owned Glocks, but like I said, I own a bunch of different firearms because I don't want to be spoiled by one particular type. Qualifications are never a problem for me and I always go home early. I also don't limp wrist and stove pipe the fucking thing because I already knew how to shoot before even applying for the job. I do like that they chose the DAO model because like I said earlier, fuck slide mounted safeties and DA/SA triggers, but that's my personal preference and the type of pistol I'm least comfortable with.