I have carried Spyderco knives for over 20 years. I found them easy to use, open, lite, and they hold an edge. They are cheap enough that you don't feel too bad when you have to drop them in the trash at the airport. On occasion, a Spyderco is the only weapon I have been able to have while traveling internationally. Having two or three packed in your check bags is not a bad thing. Tactical folks appreciate a small gift at the end of a mission/visit. They build good will. I used to sail and having a Spyderco that operates with one hand and is available is great when you have your other hand full. You can buy more expensive knives, but you will find it hard to give them up... and it is doubtful they will be measurably more effective.