Ultra (expensive) says that their software can cut people out even when the screen is not perfectly lit.

I can understand that a underlit screen with shadows is going to have all sorts of colours that are going to be shared with the talent.

But if one has lots of light...(I have a studio with studio lights)

1) How tricky?
2) Should I buy Ultra?
3) Is there any difference between movie studio platinum and the full on Vegas in their abiliity to chroma people out of the background?
4) When using a one CCD cheapo mini DVD camera, is the noise going to make green screen impossible?
5) Please can you share your green screen videos?

Tim