Product review (5 stars): The name says it all!
For some reason, my perfectly balanced washer became unhappy and started trying to escape...I re-leveled it by adjusting the feet and it didn't help, so I thought I'd try these.  It took two people to get them under the washer, my husband tilted it as I set them in place.  We started the first load on the new magic feet and I meant to check to see how it was working.  Fast forward 90 minutes, I realized the load was done and I never heard a thing!  Washer is right where we left it!  Problem solved :)  On the second load I watched it spin.  The machine does vibrate quite a lot, but the feet absorb it.  Our laundry room is in the lower level and the washer is on a cement floor, these feet stopped the noise and the walking.