Product review (5 stars): Best $30 I spent this weekend
This is the second home that I've had a 2nd floor laundry in, and I had become quite used to the vibration of the house during high spin cycles. But when our current (less than 5 y.o.) washer began vibrating so strong that I had to change load cycles, I was unsure that I would be able to keep it, or at least would need to spend hundreds on repairs just to make it 'tolerable'.

Saw these on Amazon and figured that for the price, it was worth a shot. I am SO IMPRESSED. The first load we saw/heard a bit of 'settling' in the initial spin cycle, and from there it has been nearly silent. I wish I had bought these years ago, I'm sure it would have saved my house some stress cracks!

If you have a 2nd floor laundry, it's definitely worth trying.