I love it. Makes you feel really relaxed.
The mist effect and particles in the rings are really well done.
Having a snout around your exe shows demo is made up of simple .x files and well drawn graphics, but the clever red overemphasized lighting really makes the demo stand out.
Even on my fairly run of the mill pc, it runs silky smooth.
The only thing I did notice which spoils things if you REALLY look hard, is the ground texture does not tile exactly, so every now and again you see a vertical seam.
If TGC ever do an old style rolling demo competition you would win hands down.
Boo!