The Lansky is a good sharpener. But all it does is help to maintain the same angle on the bevel. It is less useful on larger knives. It is fine for your Benchmades and there is no reason not to use it. But at some point, you might want to learn how to do the same thing free hand. It takes some practice, but once you get good at it, a small pocket stone or other simple sharpening device can go along with you in a sheath pouch or in your pocket, in case you need to sharpen in the field.
