I have heard many people complain about the hammer bite on the Walther/S&W. Otherwise apparently reliable pistols.
I once looked heavily into the Bersa/Firestorm pistols and was relatively pleased with them, considering their low cost and materials. They were quite reliable, and only some needed a little TLC to be reliable. There is a dedicated Bersa forum that I'm sure wouldn't be hard to find through google.
I own a Beretta 84 (.380) that has some heft to it, compared my fathers lightweight Bersa Thunder. After firing three standard rounds out of his Bersa, I decided that was enough and was happy that I never bought one many years ago. The recoil on my Beretta is still snappy and not pleasant to shoot, but not as bad as his. If you do go with a .380 for the purpose of carrying, I would highly recommend a minimum of a 4-5" barrel length and a steel frame and slide... Which brings me to the question of: Why not just get a 9mm? You will honestly be much happier in all aspects.
I know this is probably grinding a nerve, as it did mine when I was told the same thing. Trust me, I tend to learn the hard way.
I would term my Beretta 84 as adequate for defensive purposes. But it sure is purdy. I always wanted one in .22lr but none of the stores ever had one in stock. However there was always one of the .380 versions on the wall and an impulse made it mine.
Nice pistol, but I don't care for the caliber.