The problem with the M1, which I expect to be a good bit of kit, is what market is it trying to reach?
If I am vaguely serious about AV then I'd probably look at an AV amp, either cheaper or more expensive depending on how flush I feel. More options to connect stuff.
If I just want better sound from TV, I'd look at at soundbar.
If I want a minimalist multi-function device, then the considerably cheaper WiiM amp, which may not sound as good, but gives me Chromecast, Airplay2, Alexacast, Spotify and Tidal connect. There is also the cheaper Powernode to consider, or indeed a CEOL N12.
Basically the M1 is in "no mans land", as far as I can see
(If I were to strip back to a TV, and single 2.1 system, I'd probably go the CEOL route because I still want my CDs. And it has an MM input and an RCA and Toslink and £300 cheaper than the M1 ).