The 25° Convex-Carbide® sharpening blades quickly restore a sharp edge; while the fine grit ceramic rods hone the edge to factory level sharpness.
The good side of those sharpeners are that they are very easy to use. Someone can learn to use one effectively after watching a 30 second video. It may wear down the blade quickly, but that's mitigated by a 25-year warranty. I think it's a great solution for a casual multitool user.
The guided field sharpener is not hard either. I have doubts that LM would honor the warranty on a blade that has been messed up by improper sharpening.
I believe warranty will replace a blade on an improperly sharpened blade I am sure I have seen some from here over the years that peeps have sent in and gotten either whole new tools or at least new blades