I have had a Bersa Thunder 9 (17+1) and a Bersa UC-9 (13+1) for over 2 years.
I have no experience with the BP9, so I can't speak of its characteristics.
So, here is my take on Bersa:
Early on, I had a couple of FTF's, but I was limp-wristing. Since then nary a problem with several hundred rounds through them - mostly the UC. To me, dis-assembly is straight-forward. They can shoot as well (if not better than) I. I scored a 247

on my CHL test. I would have scored higher but there was an extra bullet hole (in the white)on
my target. That bullet came from the next lane over - that testee was
not using a Bersa.
So there! I am not one who spends a lot of time on maintenance of them. If a firearm needs constant detailng and cleaning, I don't want it. I prefer something more reliable. Every few weeks, I will do a cleaning or light oiling as called for. So far, neither of the Bersa's have not failed me. I am not trying to argue that any brand other than Bersa is junk. I am just saying Bersa has proven reliable for me. Would I consider a BP9? Yes, without a doubt, based upon my personal experience and if that model fits the various criteria that I desire. Would I consider other brands? Yes, without a doubt, if they fit my criteria.
Just my nickel (inflation at work)