extensive firewall testing and results, including the Internet Security Suites!
screen shot partial results February 2010 (will be visible for a year) :
In my humble opinion Comodo is more fitted for experienced users. For beginners and normal users PC Tools firewall is an excellent choice. I haven't tested or used PivateFirewall (free), but it's score is very good More information on http://www.matousec.com/projects/proactive-security-challenge/