I purchased a nano pack and it arrived last Friday. Day one I was very positively impressed with a larger soundstage, blacker background and more air around each note. It created a very musical sound. The next day that effect was greatly diminished and I had almost given up on the mat and cards.....until this morning. Everything I heard on day 1 was not only restored, but restored in spades. I have no idea how these things work but my system has never sounded better.
I have quite a few upgrades to my system ( Matrix IC's and PC's, new cd transport and major amp upgrades) coming up in the next few weeks that will add very positive benefits to my systems but I can't imagine them providing what these thin mats and cards have......but I'll be thrilled if they do.
I can understand how many will scoff at such experiences as mine, I've been there myself, but you're only doing yourself a disfavor by not giving them a try.
I haven't even mentioned or tried the TC.....yet.
Thanks to everyone here for sharing your results, without them I would have never given these amazing products a chance.
Tom