As I have stated in other Audiogon forums, the DAC1 is great value for money, so much so that I could not resist buying one even though it spends most of the time in its box. BUT is not unique in being great DAC value for money.
I own both the Lavry Blue and the DAC1 and like them both. Neither sound like a good tube DAC, but if tube DACs are not your cup of tea then the Blue and DAC1 come close to the best DACs around in a medium cost system. In a top class system however the difference between them and the best DACs is indeed significant. I prefer my USD1200 Lavry Blue over my DAC1. The Blue costs more and it has only XLR connectors, and no switching or volume control. But the sonic improvements are significant.
I agree with the comments that the DAC1 sounds relatively thin through the mids and upper bass, but it does so without introducing anything objectionable to the sound - and that is its trick. The result is a degree of clarity that is very engaging. It is not what I hear live, but it is very musical and sounds lively even when the recording is a bit flat. In that respect the DAC1 is coloured, but it does not offend one's musical sensibilities in any way. But switching to the Lavry the naturalness of the sound improves, images are more palpable, subtle details are more apparent, textures are more like live sounds, soundstage is larger, bass is fuller, dynamics are better, etc.
My main point is simply that the DAC1 is not unique in being great value for around a grand. Look at the Lavry Blue, the Stello, even the Mytek, perhaps the Audio Space. I am not telling you, don't get a DAC1, get a Lavry Blue - just that there are some other great value DACs you should listen to as well.
Despite my preference for the Blue over the DAC1, I hasten to add that I really like my DAC1. If I owned a DAC1 and then heard the Blue, I wonder if I would be bothered to make the change if it required me to take a loss on the DAC1 (unless the thinness of the DAC1 was creating a problem in my system, which it doesn't), simply because the DAC1 is so much fun to listen to.
I would also like to provide some balance to the reference to great reviews from audio engineers above. I follow pro audio and in everything I could find on the internet, whenever a pro audio guy compared the DAC1 with a Lavry Blue the Blue was preferred. Be careful of just accepting Benchmark's edited highlights of comments from the pro world. Benchmark is doing nothing unusual or shonky in its quotes, but do a little of your own research too.