Many of these switches are just modified Buffalo boards. I purchased a RenoLabs switch some years ago, this just another modified Buffalo board with integrated LPS. Also tried stock switches, No switch has ever been of any benefit for me, all detrimental to sound quality.
I have a seemingly unique solution that may not be workable for some, others refuse to try. I won't condemn all audiophile switches out of hand, I suspect some like the Telegartner could be worthwhile, still I remain a skeptic. My streaming setup competes very favorably with my vinyl setup, this without any switch.