Best kept secret in AC line filtering conditioning

Search Puritan 156.  There are at least three previous threads extolling the virtues of the unit, one started by me.

There are now over 80 posts regarding the Puritan 156 on A'gon dating back to the end of 2019, the great majority of them positive.  It would be regrettable if this thread ended up doing a disservice to the unit.

I don't know enough about electrical/electronic engineering to look at the inner workings of a unit and know what's going on there, but there are plenty of photos of the 156 on-line.
https://theaudiophileman.com/psm-156/

All I know is this.  A while ago I tried a range of power conditioning products in-home, ranging from around $500 to $3500.  Ten or twelve in all.  Most of them just sat there, didn't notice anything with them in or out of the system.  Amps (monoblocks) were always plugged into them, when those kinds of outlets were available.  A couple of them added their own physical hum to the mix.  The only unit that immediately, audibly, improved the overall sonic presentation was the 156.

The one other product that I would have liked to have tried, but didn't, is the Inakustik 3500.  One member here (wig) had both, and kept the Puritan.

It's pretty simple: find a dealer that will let you try it at home, and give it an audition.  If you don't like it, or it does nothing for you, send it back.

There are plenty of products promoted on this site about which I am deeply skeptical.  But this one, in my own, personal, subjective experience, worked, and worked well. That is all.