Blade Sharpener

has anyone tried that "save-a-blade" disposable razor sharpener?

does it REALLY work? I've seen it advertised on tv. Only answer if you have used it. Thanx!

I saw a show on it and it said that it actually DOESNT work and that it actually MESSES up the blade.
And makes it uneven..And on the commercial notice that they dont show you the real thinq they show you a cartoon like display of it..

Sharpening a Lawn Mower Blade quickly with a Burr King

[affmage source="ebay" results="10"]Blade Sharpener[/affmage]