This is a must-have for anyone with a decent graphic card. I experienced no slowdowns with my X800XL, and the planets are now a visual delight.
I am not sure though wether red stars actually radiate red light and etc. Maybe the effect is not very noticeable, at least it doesn't seem to have any effect on nearby ships.
And as someone said earlier, the new star background is really too colorful for my tastes. To be realistic, there should be color variation, but with very high luminosity, therefore every star should be pretty much white: some red-white, some blue-white, but not red-red or blue-blue. Stars of such low luminosity that they would actually glow red-red would be invisible from the distance the star background seems to be.
I know that with a powerful telescope you can create a very colorful image like
this, but that's with a telescope and is not natural to the human eye.