I resisted getting into power line conditioning for a VERY long time, although trusted ears like Roy's have been pointing me in that direction for a while. I wanted to be sure that the rest of my system was stabilize and optimized before going there. My fear was using PLC to tune around other issues in the system, and then having things out of balance once I had sorted those issues out.
After a very long process, finally at the place where I'm really diving into power (more on that later). The PGI TT7 and Extreme is everything Roy highlights about speed and impact is real. I'm just surprised how much of an impact it has, with the baseline of a dedicated circuit and killer power cord like the Sablon King.
As always, power tweaks are very system dependent. For all I know, I may have a neighbor with an arc welder, and a TT7 makes more of a difference for me than others, but this is a very pleasant early Christmas surprise!