Product review (5 stars): Feets don't fail me now.
I grew up where the washing machine was stored in the darkest, dankest, and most repellant part of the garage, also known as The Dungeon.  The floor had the roughest of concrete finishes which kept the top loading machine in place through a combination of fear and friction, so life was good.

Now I have my own garage which is fully lighted with banks of fluorescent tubes which shine on a polished granite floor, upon which sits a front loading washer, on a pedestal with a drawer for extra height and storage.  I insist that everyone call this place The Garage-ma-hall since it bears no resemblance to my childhood motif.  But all was not well, as the washer would try to escape by walking about six inches during each wash, which was done above a medium speed spin cycle.

I cleaned the floor, checked the machine for level, looked for shipping bolts, considered getting rid of the pedestal drawer, and researched stone to metal epoxies, when I blundered upon this invention.  Could it be this simple?  Isolate the vibrations induced from the spinning with a soft rubber foot which will naturally adhere to a polished surface?  Bring it on, because Ive had enough of being on my knees with a mirror and flashlight trying to find the gremlin or gnome pushing around my labor saving device.

The red package version of these feet contains four pucks with a soft rubber base which grabs smooth surfaces like glue.  Apparently the green package has felt on two of the feet so you can slide the machine in place easier, but I wanted no prisoners this time and had all four feet securely bound.

My floor is polished stone on top of a concrete pad, so noise was not an issue as much as travel.  I tested the feet by washing an especially soiled load of laundry, and set the spin cycle at a hyper-space velocity.  I measured two points from the sides of the washer for reference, and started the wash sequence just like a boss.  When it was done I was delighted to see that for the first time since purchasing the machine, it stayed in place.  I checked the measurements and couldn't find any difference above 1/16th of an inch.  So apparently these four rubber pucks managed to frighten or kill, my laundry room gnome, making life gooder via science and stuff.

So if you're reading this review, you may have a laundry room gnome giving you grief also.  You can try the flour test and see if he leaves any footprints, or have a shaman over to throw some chicken bones to divine a solution, but the Anti-walk Silent Feet will do the trick and magically appear at your doorstep when you order some.