How well do these knee pads work?

Contributor: davidheper davidheper
Related to: 
so how well does this actually stick to the floor?
05/07/2012
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Contributor: Rin (aka Nire) Rin (aka Nire)
I'm guessing the grooves combined with a person's weight would keep them from sliding around. There's a few reviews on them - perhaps one of them will mention if there's something more to it.
05/07/2012