I got this hmd up and running with SteamVr and played a bit of Project Cars in Vr. There were a few errors at first but after I canceled them and started again it worked good and running Project Cars in the horizon I could see the screen door effect a bit, so I am worried that this will show all the time, but I think I need to lower the brightness some and it will lower the screen door effect, I think.
Over all I am pretty happy with this hmd and can't wait to hook up my steering wheel and play dirt rally. I want to try pool nation vr too but I am not sure how to play that with just a controller or if that will work, i'll have to see.
Heres a video and some 3d photos of my hdk2 at my place: