I have a couple of Bluesound speakers on wifi (others use powerline adapters). No problems as long as wifi signal is good enough (I have 1 router upstairs and another downstairs). They are RAAT compatible so can be grouped with other RAAT products (which is not the case for Sonos, Airplay)
The only problem with Bluesound speakers and Roon (this doesn’t apply to Node 2) is that there’s a flag set in the Bluesound speaker code that forces Roon to convert everything to 48KHz (no change to bit depth though so you get 24bit if the source file is 24bit). Bluesound say that they are working on this (@brian @Andrew_Haines)