I'm a huge fan of its "big brother" the full size Pentagon, and carry one daily. The Pentagon is probably one of the most under-appreciated production knives made today.
Both Pentagons have a thin blade with a narrow, needle-sharp point. What that means for the user is superior penetration. The Pentagon blade design is optimized for stabbing deeply, moreso than many other production daggers that over-emphasize "point strength". That's only a problem if you start abusing it as a substitute pry bar, or slamming it into materials like solid wood and sheet metal.
The Pentagons have something else rarely found on major production knives today: a fully serrated edge. This is one of the defining features of the Pentagon series that set it apart from other knives in its class. Those serrations are
sharp and equal to the ones used by Spyderco. The serrations on the Pentagon will shred through tough materials like rope or rubber hose very quickly. The serrated edge will slash completely through the kind of leather and denim used in jackets with one cut. What a serrated edge does to flesh and muscle isn't pretty. It's not a "clean" cut at all.
The mini-Pentagon has a bunch of features I wish SOG would add to the larger Pentagon. The Zytel handle won't get mushy after a lot of heavy use, the powdercoat blade is non-reflective and adds rust resistance. Best of all, the mini-Pentagon has a guard to stop your hand from sliding onto the blade.
That's an unlikely possibility to begin with, thanks to the mini-Pentagon's exceptionally well designed handle. SOG didn't just scale down the larger Pentagon's handle. They completely redesigned the handle around the smaller blade and the slightly different grip a smaller handle requires. If you look at
this picture, you'll see the handle is sculpted to fit solidly into your palm. This allows you to support the entire handle in a "cross palm" grip and put the full force of your arm into a heavy thrust. The combination of guard and sculpted butt also guarantee the knife won't slip out during a "hammerfist" thrust in either the forward or reverse grip.
The only drawback to both Pentagons is they're double-edged and that makes them illegal nearly everywhere.