I have had the Eversolo in my system for a month now, so here is what I heard — in my room, on my speakers, nothing more than that.
The first week I was not sure I had bought anything at all. It sounded like my old streamer with a nicer screen. Then I stopped comparing and just played records I know well, and that is when it showed. Voices sit further forward. The space behind them is quieter. On piano I can hear the room it was recorded in, which I could not before.
What it has not done: it has not changed the bass, and it has not made poor recordings pleasant. If anything they are a little harder to sit through.
I listen mostly to Qobuz, a 4.5 by 6 metre living room, some treatment on the side walls.