I'm using four HF MC-0.5's plugged into my system's receptacles (and loving them). I contacted Mark to ask if the Puron could be used with the MC's. He said he can't divulge the technology being used, but it is a different concept and has nothing to do with magnetism. So, now I'll likely place an order.
BTW, I researched the Furutech plug-ins and they use some kind of tech that demagnetises the signal, so I was not about to try Furutech with my High Fidelity's.
Let us know where in your system the Puron sounds best.