Product review (4 stars): They work as described. Good buy!
I've always thought the anti-vibration pads were a ripoff. They look like overpriced pieces of rubber. What good could they possibly do? Turns out these have a good balance of price and effectiveness. They did significantly cut low-level noise from my washing machine and dryer. The rumbling and quakes from the spin cycles are gone. You still hear them, but you don't feel them. The noise is noticeably reduced. Definite improvement!

I went with this option because of the gel pads and shape of these rubber feet. It seemed like these pads are middle-of-the-road in terms of what you get for the money. They help. I think these are a good buy for anyone with their laundry on an upper floor like me. I'm torn between the four or five star rating. Yes, they worked as expected, but they're still chunks of what might be recycled tire rubber. Seems expensive despite being significantly cheaper than many alternatives.