I will begin with the conclusion. If you are able to purchase this combo or an Everest, you need to. You have no idea what your system truly sounds like without these. I am skeptical of many audiophile claims and let my ears be the judge. In this case, these are the real deal.
These conditioners replaced my beloved Puritan Audio PSM 136. The sound quality of the Shunyata combo is easily 2-3x as good as the Puritans. The Puritan is no slouch in the price/performance category, but it can not hang with Shunyata, nor should it, considering the price difference!
Instruments are far more detailed and spatial, and the bass is extended and deep, along with the width of the soundstage. Vocals are eerily present in the room and crystal clear. A little of the system warmth disappeared but for the better. The background is entirely black (I never understood this term's meaning until I actually heard it). However, the most impressive attribute is the low-level listening detail. The bass performance is just stunning at a low level, a head-shaking experience.
If I were blind-testing my system before and after, I would 100% state that they are two different systems. These conditioners are that transformative.
I have an Omega XC power cord coming, which is supposed to increase the performance to another level; I don't know if this is possible, but I guess I will soon see!