Product review (2 stars): They couldn't control the MAMBO.
These didn't cut the mustard with my mambo machine.  A Whirlpool Duet, naturally.  I had the thing on solid wood floor (single story), and leveled.  After it's maiden dancing exhibition, I looked for an answer and was impressed with the reviews for the pads.  Got them, sat the beast on them, and leveled it again.  Stuffed the soiled laundry into it's gaping hole, and waited for the performance.  Hey! Mambo-Italiano!  Just another rerun.  Although the dance did seem a little less violent than before.  Anyhow, I've just rid myself of the dancing queen and bought a Samsung.  WORLD of difference!  On my old beast, I couldn't put anything on top of it.  Even with a towel underneath during any spin sequence, it'd be on the floor.  You can hardly hear the spin cycles on the new one.  I'm glad most here got the benefit of these pads for their machines.  And there probably wasn't a fix in store for mine except to go live in a thrift store somewhere.  I can only relate my experience of their interaction with a dysfunctional washer.  Sad.