I have MacAfee on my desktop and laptop. So far so good with virus protection!
However. I bought MacAfee internet security thinking I needed a firewall for ADSL... what a load of .... First off you needed to download a patch after installation to get anything to run. I found this out after 3 install /uninstalls. The firewall component is flaky in that the logs show you are unprotected when the program switch/icon is set to protected. It doesn't work with ICS and the internet security is only good for the single computer and relies upon a login when the computer starts up. So if you want any other user to have restrcted access reboot!
So now I have a Netgear RP114 NAT router for sharing and only the anti virus component of MacAfee installed.
Must reports on this site seem to give a thumbs up to ZoneAlarm for a firewall.
My personal experience says to steer clear of suites as they are a hotch potch of programs and pick the best of exactly what you need.
MAx