Looks good for keying sharp edged flags and such. Try it with some frizzy blonde hair and see what you get. Is there a spill suppressor in that keyer. The link to Serious magic Ultra 2 Looks very interesting, Havent seen this yet. If it's the same as the Serious Magic version, you can activate it with this activation tool.
http://www.adobe.com/support/downloads/detail.jsp?ftpID=4246
Danny Hays