I just recently purchased a Sharpmaker, as I was dissatisfied with how the serrations came out using my Lansky. I have to say I was a little skeptical about not having the knife / sharpener angle held consistently, BUT... after using it on different types of edges (both serrated and plain, straight and curved edges) I have to say I AM IMPRESSED.
I never felt the Lansky could match the factory edge on my Spydercos or my Cold Steel Voyager. If anything, I think the edges after using the Sharpmaker are so close to factory (or better than factory) that I can't tell the difference.
Sharpmaker has my vote!