Got mine today. I was about the 20th order placed on Day 1. Lest everyone start to wonder, I sent in a prepaid overnight shipping label. You didn't get skipped.
To set the stage a bit, I have relatively limited experience with DACs. Up to now, I have had the Dacmagic and the Cobra D10 units. Both were a decent improvement over the Squeezebox internal DACs.
With just a few hours on it, I can say that the Bifrost is significantly better than the Dacmagic. The primary quality that I notice is a much larger sense of space and soundstage. This observation is made using HD600 headphones and the Asgard amp - a combination that I have been using for 7 months in conjunction with the Dacmagic. The sound of the Bifrost is, to use a cliche, 'organic'. Nothing calls attention to itself, but everything sounds alive. By comparison, the Dacmagic was a bit 'shimmery' in a way that is dazzling at first but wears badly over the hours.
Physically, the Bifrost is identical to the Asgard with the exception of the volume knob. The two look great together. And for those of you interested in heat output, the Bifrost runs just warm - like you would expect from a unit with electricity running through it. By comparison to the egg-fryer (Asgard), it is positively cool.
I am not sure how much break-in will factor in on the Bifrost. But I have reference recordings, as we all do, that will help me to accurately assess changes over the hours.
Based on this extremely limited session, I can assure you that I am saving for the Statement product to use in my listening room!