I own a Innuos Zenith NG and prior to that a Zenith MK3. They both fed my MSB Reference DAC. I think the sound improvements from streamers are largely a function of your DAC’s USB implementation. I like innuos products for their Sense app and convenience of use. In my system the SQ improvement has been marginal. I have a very revealing system.
What happened to the Innous discussion
I really wanted to read the Innous discussion because I recently bought, and then returned, an Innous Zen. I had several people listen to it a/b with my Bluesound Vault and the difference was so minor that most couldn’t hear a difference. One person heard a small difference and thought the Zen had more "punch", but also thought it wasn’t as clear and revealing as the Bluesound Vault