Product review (4 stars): Remarkably Effective
I purchased the Silent Feet twin pack for our 2nd floor LG front-loading washer/dryer. Short story: they work. Very well. Easily 90% quieter/less vibration. At some point you'd think an appliance manufacturer would get really smart and include these as part of the product.

I rate only 4 stars only because of the value factor. They are not simple rubber disks -- there's two layers of differing densities of high-tech goop. But still, $80 for two machines is a stretch, even though one worth taking if you want to stop picking up Bad Vibrations.