I hooked this baby up to my THX 789, and I CANNOT hear anything when I route it near my computer monitor and usb cables! Before I had a D50S hooked up, and when the interconnects neared my monitor especially, I'd get buzzing and odd data type noise. Now, the balanced connection fixes all that. I use it with Hosa 1/4" to XLR cables, and it's just perfect.
If I had any CON's, it's that the enclosure is a bit basic and there is only one nyquist LPF filter, but I can't hear the difference between any of them anyway.
Overall, it's a must buy if you have any interference with RCA connections and you have a balanced amp.