Well, I don't have much experience with the Rift (I suppose it's more polished than SteamVR) but this whole VR affair can be summed up in three words:
GLORIOUS BUGGY MESS.
That's what it is. Constant problems with this or that, frequent restarts, HMDs refusing to operate for unknown reason, problems with audio switching (to/from VR, mirror audio, communication device...), bluetooth driver giving up after a few windows updates for no apparent reason... But when it works it's awesome. And don't be afraid, this sounds bad but is in fact a mild annoyance. SteamVR is pretty seamless, and I am using the beta version with my Vive (though with pimax I can't because it cannot turn the lighthouses on/off remotely via bluetooth on current steamvr beta). Basically it's like this - you set it up once (takes a while to get things right) and it just works then. It's when you make changes that things can go south.
Starlight, are describing the Pimax setup or Vive setup in your Glorious buggy mess description? This is kinda what is putting me off ordering the Pimax now, having been using the rift for 2 years now, i have done away with all that messing around, which for me was a complete nightmare in the start up, Now a days, I just start VA, Rift and ED and i am in game in VR.