I had those units too, and sold after 3 months of using, because nevertheless I have got improvements they were not substantial.
But it was really annoying it was generating (especially P1) some kind of noise and I could not watch TV when it was power up. It was interrupting music by itself, I could not find the reason. I have heard bigger improvements with some old Theta 16/44.1 DAC hooked up to my old Arcam Alpha 6 them with this 24/96. Those unit got me better liquidity, bass was a little better defined but somehow liner, width and depths was the some, dynamic in micro scale was definitely better, but in macro was in opposite way.
I would keep it but because of interference and these annoying interruptions I have decided to sell, even it has given me 10% of overall improvements in some fields. But definitelly it was not class A.