At Guard Well, we study Libre Knife Fighting as taught by founder Scott Babb and sprinkle in some Sayoc Kali from the Philippines. If you are going to carry a knife for protection, please be aware that the laws surrounding knives, blade lengths, concealed carry etc. are somewhat archaic, confusing, and open to interpretation--by the courts and not you. Laws vary state to state and in many cases from town to town in the same state. So if you are going to carry, please research the laws as they pertain to your particular situation.
The Bottom Line on the Darter: Excellent knife recommended by a friend who knows infinitely more about knives than me. I wish I had it during the two+ years I spent in Afghanistan.