Product review (1 stars): Made the vibrations WORSE!
Ok, I bought this bc my sister told me it worked so well for her.  Well, apparently it is really hit or miss.  Unfortunately for me, it was miss. The shacking in my house was not that bad, but I was hoping this would stop the shaking and lessen the noise.  nope.  the vibration and noise only got worse, a LOT worse.  We left it on for a few weeks and tried moving the washer around, but it did not help at all.
now i guess i have to toss them.  If you give them a try - save your packaging so you can return it if it doesn't work for you.