I am using this network switch between the Series III StudioLive desk and two NSB 16.8 network boxes. The switch has enabled me to have the NSB's accessing different network points in the building, not just daisychained in the same room, and we can now have the show band off-stage during performances.
Can't really rate the sound for this product as it doesn't make, or have, a sound; there have been no issues with network drop-out and the sound is as you would expect from Presonus equipment.