Product review (3 stars): Works for Washer, Not for Dryer
Product works great on my front load washing machine.  It no longer vibrates or moves.  Same can't be said for the dryer.  It doesn't move, but it still vibrates the house.  Also, since they are designed not to move, installaation with limited space is difficult as you must position the lift the washer and dryer onto the 'feet'.  Heavier = harder.