My two cents!
I have used Vertex balanced mains products on my source components since 2008 (Elbrus - now relegated to A/V system).
As my system has grown and the demand for more outlets with it, I now use an Alethiea (Vertex) PSU2, which has been designed around the principles of reducing RFI/EMI and microphony in the system infrastructure. From the IEC input socket, the feed is filtered by the shunt input filter. This shunt input filter does not add any inline restriction to current flow and is designed primarily to be working at very high radio frequencies. Next, the feed splits and the first line passes through an acoustic absorption module, then to the bypassed output sockets. This arrangement provides the feed for power amplification - it has been well conditioned by the shunt input filter, and has the acoustic absorption module inline to lower the progress of vibration from the domestic mains wiring, into your power amps. This also blocks the feedback of vibration from your amps and into the feed to the balanced section!
Next is the feed to the balanced section, which is taken through it's own acoustic absorption module keeping the feed to the transformer (limited to 300 watts continuous output) as acoustically quiet as possible and also draining back any vibration that maybe generated by the transformer itself.The balanced mains transformer is wound to the ratio of 1 : 1 , but the output winding is centre tapped to ground, to produce the anti phase 115V at each end of the output winding. The transformer is mounted in it's own poly box, with an acoustic absorption labyrinth to drain vibration away from the transformer itself - a very important factor for the performance of this PSU. The box is decoupled from the chassis with soft rubber mountings.
The balanced transformer brings the significant benefit of 'common mode noise rejection'! So, any noise picked up, will be exactly the same on both of the balanced lines, so there is no net differential from this noise, across the power supply in the source components.
Finally, each of the four balanced feeds is fitted with it's own combined acoustic absorption and RFI filter module, minimising any interactions between each source component connected, particularly with high frequency vibration and RFI coming back from digital processing.
Because I have a requirement for mains distribution to eight separate source components, I slave a second Quiescent (formerly Vertex AQ) HiRez Taga Balanced mains distribution unit from one of the two unlimited bypassed feeds on the PSU2.
I find that the audible benefits of balanced mains distribution (done properly) manifest as a very low system noise floor, coupled with great transparency and and more palpable, richer presence to individual instruments, being smoother, more detailed and less fatiguing (especially with digital source components).
