Product review (5 stars): Why didn't I know about these sooner?
Our laundry room is located on the first floor of our house between the kitchen and the garage.  Our front load LG washer has ALWAYS shaken the house on a spin cycle.  We had the repairman out who gave the line about how front load machines are supposed to be on concrete floors.  Well that wasn't going to happen.  So we've been enduring the house shaking for 3 years now until I did a quick Google search on the problem.  After reading about anti-vibration pads, I decided to try these and they work incredibly well.

I like this set because it comes with two pads for the back that can slide on the floor and two that are sticky for the front to keep the washer in place.  Installation was easy and the difference is huge.  The washer itself still shakes, but the vibration and reduced noise stays in the laundry room where it belongs.  I'm very happy I bought these.