There are two camps... buy stuff you don't need regardless of whether its warranted or not, and buy stuff that is useful.
The argument FOR power conditioning is basically made if you live in, say, an old Victorian Flat with wonky electricity. Then you might need a power conditioner.
The house I live in was built in the early 80's, and even though our landlord did some wonky things while building it, the power is largely solid.
Yes, lights dim a little when the fridge kicks on, but that's the worst of it. *knocks on wood
I have no need of a power conditioner.
End of the day, it is your system and your ducats.
Frankly, my Monoprice 12AWG OFC Cables sound just fine; no need of Audioquest there. My Monster and APC Power Strips haven't failed yet (less than $100 total!); no need for Audioquest there.
So I ask:
What do you hope this will do for you?
You mentioned on another thread, IIRC, that you had upgrade-itis setting in.
Save the money and buy some great amplification, or a great AVR, or some epic speakers. I'd love to upgrade to some swanky ATI amps (or something similar in quality). Maybe I would possibly hear a difference. Maybe not.
That is a want, not a need.
So to answer you very first question: It is an absolute waste of money, imo.

If you want to test it, have somebody you know move plugs around. Get yourself a good quality Triplite power strip/Surge Protector to play with, or just a $35 Monster. Sit down blindfolded, and let your friend plug things in as they choose, so long as you don't know whats going on. It cant be done fast enough to overcome sonic memory... But you get the point, I think.
Unless you are in one of the outlier, pre-1950 homes with questionable electricity, then I think you good
without.
Now, my consultation fee is half the cost of that power strip I'm trying to talk you out of buying!
