I tried Pigasus this week. I had to pay for the damned thing too but it was useless since it couldn't see any of my network shares and wouldn't play any audio. It did have some nice features tough, one was that it would re-centre (fixed) on the ceiling, and the other was the option to adjust pupillary distance.
Any chance we could have both of those? I know I can unlock the video and it will follow me to the ceiling, but being able to re-centre is nicer than the headache inducing video following. And a lot of folks seem to like the PD thing!