i use za pro and have had blackice but got rid of it after it's refusal to address outbound packets as a threat.
za pro is a good f/w but no software f/w is as effective as a properly configured hardware f/w.
za is my third firewall, i had conseal, then blackice, now za pro and I have had no problems other than my son disabling it because he is too lazy to set it up when a new application trys to connect and za asks if it is ok.
