Product review (5 stars): The Pads Really Work
The pads really work!!  We have a stacked front-load washer and dryer on the second floor of our house.  When the washer went into the spin cycle, the house used to shake (it felt like an earth tremor).

The pads didn't completely eliminate the shaking, but they SIGNIFICANTLY reduced it.

Read the instructions before installing them.  There is a top and bottom to the pads.  We discovered it after installing, so we had to re-install them.

It's a great product.  It is simple, but it works!!  We highly recommend it.