Product review (4 stars): Works enough, i like it
These are different than the ones at home depot.  if you go there and take a look at the ones there, it's all hard. like a really thick hockey puck made out of very dense rubber.

These silent feet is half hard (on top) and more elastic on the bottom half (against the floor).  Now is this better then a product that all hard?  I don't know.  i never tried the one from home depot.

However, these do appear to work as intended in reducing the vibration to the floor.  It reduces it enough that im happy with the product.  Does not elminate 100% when my machine goes on the highest spin cycle.