I compared this extensively to my Audio-GD NFB7.77 and in some ways it's better. I wanted to keep it mostly because it's 1/3 the physical size of the Audio-GD. They sound pretty similar but the Audio-GD has a bit more of a relaxed sound, and slightly less detail. My preference for the Gustard is the combination filter which brings it closer to the sound of the Audio-GD which is more natural to my ears. The vivid filter is hyper detailed which I liked for movies & TV. I am changing jobs so I cannot keep my headphone rig any longer. I also don't need two end-game DACs. This DAC includes the ESS USB input card. I used the I2S input with a KTE Singxer SU-1 DDR, but I really don't think it was that much better than the USB input alone. This is where it really pulled ahead from my Audio-GD because the Audio-GD really requires I2S input to sound its best. It's in perfect condition with no scratches or marks. It also comes with a remote which allows you to change inputs and adjust the processing settings. $1100 shipped for USA Friends & Contributors only.