i own the lansky system, it is a good concept with poor build quality and as a result it never seems to hold the knife consistently, and i would never consider using it on my expensive knives.
I think maybe this shouldn't be in the writing section? But it still got plenty of votes and I've been wanting to get a Lansky sharpening system ever since I first used one!
I've had an Edge Pro for some time, it does not work well at all since there is no provision for clamping the blade. They will tell you it's an easy skill to master, holding it steady by hand, it's not nor should it be.