Product review (4 stars): Works to stop "walking"
These pads work very well as far as stopping the machine from "walking".  Our washing machines hasn't budged since we put it on these.  As far as the vibration, I can't really review on that because our machine sits on a cement floor.  The machine itself is just as loud though.  I also got a pair for the dryer as I wanted both machines to be the same height.  I don't think they really did anything for the dryer as the dryer never "walked" like the washer.  Again, with having them on a cement floor I can't really say if these would stop vibration.