Chroma key in 12 is still not that great.  I got it to work fairly well with tight head shots of the talent, but anything other than that wasn't usable.  I find it unbelieveable that there isn't much on the market to give you a clean chroma key - as far as I know, Ultra is the only product available that produces a clean chroma key. Unfortunately, it is now bundled with the Adobe Master Suite, with a price tag of $1500.