I’m partial to Keylight myself – very easy to set up and tweak in a wide range of lighting and subject circumstances. Yes, it’s included with AE, but it’s also a separate plug-in for FCP. IMO, the only thing better is Ultimatte, but it’s a bear to learn and tweak. The one thing Ultimatte does better than anyone is spill control around hair. I’d put Keylight and Primatte at essentially the same billing.
HandyGeek