I don't want to be a downer on those using the slot style but I tried one a week or two back, and it ruined the blade. Luckily it was a backup swiss army but I think I'm done with quick and easy. I'll try my hand at sharpening by hand. A few days later I bought a DMT dia-fold, for both regular blade and serated, online. The serated seemed to work well on my leatherman.. I'm still waiting for the reg blade style.

I might buy the speedy sharp for an old machete. Its dull as all heck, and it was only $10.... Always good to have a backup machete when the zombies rise.. yes, kidding