Brand new not much difference (a bit but not wow)
After 1 hour things started to be improving (time to warm up ?)
and now after 2 weeks (I think capacitors need to brake in) it really shows an improvement: tighter bass, more details, better sound stage in the placement of the instruments.
I connected back my old Dlink switch to make sure and I would not install it back.
So I am very happy with the purchase, if someone has an expensive digital rig, you get an improvement with reasonable investment. totally worth it (it is less than most “audiophile” USB cables).
One thing, though to help the overall sound, I did upgrade ALL my ethernet cable to cat8, and router and switch are powered by low noise linear PSU.