EDIT: Works out of the box. For best experience you'll want Fedora or Arch or SUSE which provide the asusctl package for modifying things usually only available on the ROG Control Centre for Windows. Dual graphics output from HDMI/DP also worked after an initial update and some reboots.

I'm looking at a pretty solid deal for the QHD model right now and I'm wondering if anyone has the same model already. How's the dual GPU setup?

I'm sorta hoping the 6800M can drive both display outputs without much hassle because I used to have to reboot when I had a 1650 mobile system in order to use the HDMI ports (they wouldn't output unless the desktop was running exclusively on the dGPU).