Product review (4 stars): Pricey but probably worth every dollar.
Using this for my brand new stacked Kenmore front loading washer and dryer. The pads are placed on top of Pergo type flooring which is turn is placed on top of concrete slab. Having used top loaders all my life, I was amazed at how much vibration these front loaders can generate. Anyway, the pads were put on by the washer and dryer home installer. They removed the transit bolts form the washer (which can cause some of the vibration complained of in other reviews), sprayed the bottom of the pads with windex (to allow them to slide as they adjust the stacked washer and dryer on top) and then we turned both units on. The vibration was absorbed into the pads. No walking even though the bottoms of the pads were still wet from the windex. I don't know what the washer and dryer would have done without the pads but unless there is some hydraulic shock system built in, I think I would have been in trouble had I not installed the pads.