I have 5 of these little wonders. A friend and I experimented with using NH's and no other conditioning, the sonic benefits were clearly heard. Using them with other conditioning (I have an RGPC 400 and a Furman Elite 15 PFi) may relegate them to a background role, but I still use them.
One interesting note, I have a noise harvester plugged into the RGPC 400, into which the Furman unit is also connected, and when the Furman is on the Noise Harvester in the RGPC 400 does not blink at all.
