I have one. It’s very good. Previously I used an ARC SP8. (I know!)
I find the sound very detailed and clear, but in general, talking about the way something sounds is very difficult for me.
The 390 is very well built and I’ve had no trouble. The MIND android app a little fussy. (BlueSound has nailed the app, imho.) I listen to cds on my nas, downloads and vinyl.
And I agree with Absolute Sound: the headphone amp is excellent.
I hope you get a chance to hear one. And I haven’t heard anything about Sim being in trouble, any more than, say, GM.
Good luck!
Oh, I did have one issue: The remote started to come unglued, I sent them a photo, they sent me a new one.