Pros: Great DAC for the price
Cons: slightly awkward placing of power switch
I bought the Bifrost to complete my home audio system. This started with me listening to my portable player at home, followed by open headphones, then headphone amp and finally HDD based music and the DAC.
The more home listening I did the more I needed something to link my HDD full of high resolution music to my lovely LCD2 headphones. As I'd been using a Lyr amp for some time, the Bifrost was the obvious solution. Fortunately, computer has optical audio output so I could get away with the basic bifrost without the USB option, so for me the USB as optional is a money saver rather than a cost.
I can't compare the sound with any other DAC, but the quality of playback is far better than when I connected my PC to the Lyr via standard audio connectors. The gain over IBasso DX-100 to Lyr via its line out is greater in convenience terms than in audio terms and certainly less of a leap than the gain from PC to Lyr direct.
My only minor quibble is the power switch is not easy to use, being placed right at the back, so I tend to leave mine on for more time than I would like.
In short, I now have easy access to my 250 GB of mostly high resolution music straight from desktop to ears and the Bifrost is a great, cost effective, neat link in my digital music chain. I would happily recommend this DAC to anyone.