Elizabeth,
Thanks for helping me with other audio issues.
I know where you are coming from. I also had doubts about the product. I installed a few mats many months ago, I did not experience any wow factor that many on this thread expressed when installed and I actually forgot about them.
But months later when I removed them, I did get a huge music quality suck out. By that I mean the music lost its vibrancy and the live quality that I guess I had just taken for granted until I removed them.
To me, I think the mats act as sort of a rfi/emi blocker.
Elizabeth take them up on their free trial. But leave them in for at least a month.
ozzy