Product review (2 stars): Not impressed
These pads seem to help - but not as much as I would like.

I needed something to help with a resonant oscillation in a new washer with a high-speed spin cycle, in a second floor apartment.  When the washer was first installed, it worried me; the whole building rumbled.  So I bought these pads.

They helped, but not much, and something simpler - though less aesthetically acceptable - worked far better - towels.  There's a wall on one side and a dryer on the other; I lodged towels on those two sides while waiting for these pads to arrive, and they made the oscillation completely unnoticeable.

My conclusion: these pads should not be so expensive; they're not worth the money.  Something for the sides of the washer work better than pads for the feet.  And in that regard, the high-tech material that seems to justify the expense of these pads is just a waste in this application.

So I'll be looking for some cheap foam - like packing foam - to do what these pads didn't, and that just looks better than the towels did.