Sean Chan has published an early review of it at Head-fi. It's worth a read.

“The Flow has just taken over my Cypherlabs stack in that respect of “presenting a big sound”. The Flow has been able to just make the sound bigger, larger, wider, deeper. I’m actually comparing the Flow to my Invicta/Zana Deux desktop gear - although not up to that level it’s mightily close at a fraction of the cost. So despite the somewhat clinical tonal presentation, it’s width and depth presentation on the other hand makes the overall music sound so palatable to the ears. ”