From one review I found:
- Cons
Price
Potential airflow interruption and rising of in-case temperatures if handled incorrectly
The review notes that the price of the kit was $85. My guess is that there are other chemically and structurally similar foam-pad products "out there" that cost less, and if identical in composition, only require some DIY adhesive solution and cutting.
I've personally tried Akasa PaxMate and Spire's Noisedeadener pads -- they are almost identical except that Akasa is softer and "cushy-er."
At a price of $9 to $12 (Spire vs Akasa) for those kits, it was worth it. It didn't make "all the noise" go away, but it turned "NOISE" into (noise). It helps.
There has always been the issue of obstructing airflow with material such as that like Acoustipak's. And this is the trade-off between quiet and cooling: you need air-flow for cooling, but air-flow is the bearer of noise.
Other than that, the only problem I have with any of this stuff is the marvelously effective adhesive that coats one side of it. You need a razor-knife or putty-knife if you ever have a need to remove it.
These are what I call "nickel-and-dime" solutions to noise (although the Acoustipak kit is not nickels and dimes). They extend your choices of potentially noise-making devices such as fans, where some fan might be a bit noisier but also more effective for your purposes. If you can "kill" some of that noise, you have a wider range of choice.