Allow me to add my two cents from personal experience. I have a half dozen Silencers and they work as descibed and in a word superbly. I generally place them in outlets with noise makers (refrigerators, freezers, desktop computers, washing machines, etc.).
I also have a number of his Empowered Power Cords and they are overachievers for what they do compared with others on the market in terms of results and price. In addition, Igor shares a dislike of mine concerning those unbendable garden hose cables you so often see. A quick look at the aforementioned pictures will show how flexible they are!
As to the effectiveness of judicious use of ERS paper, I wholeheartedly agree. I live next to Fort Dix in South Jersey and I am surrounded by RF. It is also good in strips inside preamps and such separating power sections signal passing areas.
If you are looking for a killer DAC, make sure you drop Igor an E-mail. He has a modified design that has bested multi-thousand dollar models. I ought to know because I heard it and bought one!
PS. I forgot to add that the Ersamat is a killer accessory for vinyl and I am currently using his Pneufeet under all my equipment. Let me say that I have not had some super large buy at once order, but have added to my system as Igor keeps adding new items over the years that impresses my ears.