We talking the spyderco sharpmaker? And we talking about the KME knife sharpener?
If so I have, and/or had, a generic lansky/gatco/KME type system, a Lansky system and the sparmaker.
Unless you are wanting to modify grizzly heads or rebevel new knives I wouldn't waste time on the Lansky style systems.
I have no experience with the KME
IF you do want to modify heads, sharpen new knives in the <$40 price range [sorry, but most all in the price range need to be rebevelled] or need to remove a lot of material fast the Lansky style shines.
If I was confident in my filing ability I would get rid of my clamp&guide lansky.
Saying all that I think the KME is a much better unit just from looks. I like my Lansky, no regrets. Don't know about the GATCO, and the sharpmaker seems overpriced for what it is but I would buy a replacement ASAP if I lost mine!!!! I've used other "crock-sick" systems...YES the sharpmaker is more/better!