Yes, that review means nothing. Either it's fraud, or the guy doesn't know how to use it.this review is utter bs nothing else.
have been using decos from last 3 yrs and pretty much used every model including M4 , mesh has nothing to do with hardware version , I had their V2 and it worked perfectly with other decos by connecting wirelessly.
Though the admin experience of Deco is pretty bad - only through the app, and need to retry the app sometimes to recognise the Deco's. But it works, with some glitches.