As an Audio Engineer / Tech Geek, I was SERIOUSLY searching for a solution to our House Renovation and Large Appliance upgrades.
I was very hesitant to read too deep into any reviews or claims of the myriad solutions available online. Knowing the physics and applications of attempting to stop low and sub sonic frequency information from traveling through structural environments, I imagined only marginal improvements from ANY solution.
You can never cover all the bases when you are doing a major house renovation. Our kitchen renovation is nearly 100% successful in marrying from, function, and ergonomics. The only unconsidered factor was moving the refrigerator across the room to a new "cabinet" surround recessed into the basement stairwell wall.
This worked like a charm in beautifying and adding much needed space to our kitchen, but the by product was a direct coupling of the refrigerator through the support beams in the wall to our Bed, which lay directly above the new location on the second floor.
After a few restless nights, with what sounded like a school bus idling outside our Headboard, I reluctantly ordered your Silent Feet.
The kitchen carpenters were thankful that there was just enough space to install these without having to add an inch to the custom cabinet surrounding the Fridge.
IMMEDIATELY the coupling of the Refrigerator motor noise was gone! Additionally, the Freezer and Fridge Doors no longer "Rattle" the adjacent walls, cabinets, and glasses in the cupboards! I used all four of the "slip / padded" feet, saving the "sticky" ones for the below.
Next up, we purchased a stacked front loading Washer + Dryer. This was put in a Closet / Nook outside our bedroom. While this makes the laundry chores a zillion times easier than having to walk down 2 flights to a cold moldy basement, the Super Spin Cycle on the washer and the dryer thump from Towel + Sheet Loads made scheduling laundry around guests, bedtime, and "reading" time, seem like an even bigger chore!
Our house is from the lat 1800's and when either the Washer or Dryer was on, you could feel the entire house gyrate slowly from the massive energy in these spin cycles!
Sitting in a chair on the first floor during the turbo spin was akin to the sensation of standing on a 4 floor mezzanine in one of those Giganto Malls! You literally feel vertigo / sick from the slight but earthquake reminiscent motions!
I figured this would be a tough one.
I literally tilted the entire Washer / Dryer units and placed the feet on the 2 front, then the 2 rear of the washer only (bottom unit).
Gone is all the movement throughout the house from both the washer AND dryer!
We can actually run the units while our 8 year old is sleeping one room away, and have no problem letting the dryer go while we drift off to sleep on the other side of the wall!
I keep thinking I am just not noticing or forgetting to check if the Isolation Feet are "working".
My Wife even said she hasn't remembered to take note of either unit when they are on, so I think that pretty much proves it! Out of sight, out of mind! Problem Solved.