I am also quite intrigued by Innuos -- especially the Mini. Currently I have a Naim ND5XS as source, but an Innuos/Chord Qutest or Hugo 2 combo has a certain appeal, and should sound better. I have not yet heard the Qutest, but Hugo 2 -- a great DAC, which is, in my view, better than the DAC in my ND5XS.
However, I am a bit anxious about leaving the Naim app behind. As you would expect, it works well with Naim streamers; and it has Tidal integrated. We love "browsing" Tidal to find new recordings (mainly, classical music).
I wondered about first-hand user experiences with iPeng -- that is apparently the app Innuos recommends for iPad users. I went to a local dealer, who stocks and sells Innuos. But he was not at all familiar with the iPeng. I took, for instance, calling Innuos' support line twice to get Tidal running. After that I didn't dare to ask about the BBC iplayer or internet radio...