Product review (5 stars): Worth every penny!
My wife and I live in an apartment above the landlord.  There were no washer/dryer hookups but we were able to purchase a combo unit.  Then we ran into the next problem, the unit vibrated the structure.  And not just a little shake either.  We didn't know what we were going to do and were considering moving to a new place.

Then my wife purchased SilentFeet.  She ordered them online and showed me what she ordered.  To say the least, I was extremely skeptical.

Well, I just got done with the "installation", haha.  I laugh because you just lift the machine and put them underneath the feet.  It literally took less than a minute.  They work perfect!  99% of the vibration was cancelled out and we're back in business of washing our own clothes in house.  Excellent product.