Have received mine earlier this morning and tried a bunch of demos out. It works very well in seated configuration, I didn't notice major tracking issues that would detract from the experience. Standing up for Job Simulator did introduce problems because of the positioning of my camera. I think I was obstructing the headsets sensors with my arms at points and then shit just started swimming. That game may need a better calibration tool in the beginning to make sure that can't happen.
As far as games go instant purchases for me are going to be Rez and Thumper. Thumper especially is just mindblowing in VR. Rez works great too and is nuts.
Rigs works well, although during that I did feel my face go warm, maybe playing that for longer messes you up. It seems like a fun game, but maybe not worth $60 depending on the content.
Tumble VR is exactly what you expect and works very well with VR and the moves.
On topic of controller tracking: I did notice that the tracking of the Moves and the controller sometimes is a little off axis. In those cases it helped to briefly obstruct the light, which would recalibrate it or whatever.
I did have an issue with fogging in the lenses, which was because the rubber things that are supposed to seperate the insides of the headset from your nose and stuff lined up wrong and needed to manually correct that when I put it on. After that it was no problem.
Definitely did not have an issue with the aliasing or low resolution. If you really focussed on parts in Rigs you could see that it runs fairly low-res, but in action you don't pick up on that ever. You just get a sense of the scale of the environments and also that sense that you're there.
Looking at the list of demos I noticed that I still have some big games to try out. Will do that later today.