The good?
Ergonomics - the gun fits almost everyone with excellent trigger reach and comfort of grip. Most modern Brownings have ambi-safeties for us southpaws.
Perfect size - short butt for easy concealment, but full length slide for good sight radius.
Efficiency - just the right size for the caliber. Not overly fat or tall, and the slide is slender and sleek, making it a joy to share a waistband with.
Caliber - if 9mm isn't enough, you can get a modern .40 S&W, but the 9mm IS enough.
The bad?
The "shelf grips" - make the Browning unnecessarily wide. Look for Spiegel grips for the BHP. They make the gun perfect.
Magazine disconnect - a lot of people whine about this - it ruins the trigger, it renders the gun inoperable if the magazine is ejected, blah blah blah. If you're that much of a nervous Norvus about it, you can take it out in a kitchen-table operation. Me, I'd rather have it, simply because if it comes to wrestling with the gun, I just hit the mag release and I let go of an inert paperweight and pull out my pocket knife and begin carving off the face and throat of the guy with the gun.
Locked and cocked - for many, condition one single action is the finest trigger system on the planet. For the undertrained, it can be a dangerous and scary thing. Learn to carry locked and cocked properly and all will be fine. That means a lot of training and weapons handling, which is a good thing anyway.
That's it in the nutshell.