i have had a zen stream for a few months like... i use it only wired with ethernet, with add'l lps, and in roon endpoint mode
sonically i find it to be really excellent, i think due to the many levels of signal filtering and isolation built in (and the lps)
it is very close to the sonore optical rendu set up, which i think is among the very best setups for purity of signal and sound
that said, there have been reports of wifi issues with the zenstream, which i hope have now been addressed by running firmware updates since the introduction of the unit last fall