Silent as I have not detected the hissing sound mentioned in previous posts.
Using LDAC from my phone steaming high resolution Qobuz.
Bluetooth implementation so far seems to be really excellent.
Just a slight loss of overall fidelity and some kind of harshness at the higher registers as is to be expected from bluetooth!
I'm using my Neo iDSD for a few days and it works flawless. Mostly with the HD660s, sometimes directly, sometimes with a Corda Jazz FF as external amp. Didn't encounter any noise issues.
So far I've used spdif coax, usb (asio, win10), bluetooth (pc, win10). SE and balanced out.
Functionality is great, sound is great, too. I'm looking forward to spend more time with it.
So glad to hear from you both and that you aren't experiencing any of the noise issues that have been previously discussed!
Looking forward to more of your impressions as they come along.