If it is anything like the AVA Ultra DAC then it certainly needs some hours on it. The Ultra was somewhat flat and unexciting out of the box, vocals were buried back in the mix. I was very disappointed and thought I'd made a big mistake. I pulled it from my rig and let it play in my headphone setup for approx 160 hours. When I put it back in the main rig it was a different DAC and sounds fantastic, very open, dimensional, natural, organic ....
I look forward to the impressions of the early adopters, especially those with the Ultra, as I would fear replacing the tube DAC with a SS one without thorough comparison. However, the Vision does sound promising and I'm watching with interest ...