Your thread opener could have read something like "Bersa Thunder for self-defense".
That being said, I have one and carried it for two years (2008-2010.) Loved it, but I found a then-scarce Kel-Tec PF9 for a good price and switched to that. The Bersa is, to me, the better shooter, but I had a lot of experience with the DA/SA trigger mechanism, being an older shooter.
If you have the Bersa and can shoot it, it will serve you well, and there is little anecdotal evidence of it failing to stop attacks that it can be proven that would have been stopped had a 9mm been used. Still, I like to take the 99-percent chance of success and raise it to 99.1 percent if I can, so I carry the 9mm.