It's not truth. You must read more about any 'hole' in ZA free version. At least you're talking that the version has less feature than the Pro one. This is obvious. There is no hole in close ports to Internet (the major use of a firewall).
Its in the way it checks mail, it is fine in the pro (paid) version, something to do with the .dot extension or something, but this may be fixed in the latest version.
Well, a little bit more as it is a 'rule' based application and not an 'application' based like ZA. But I don't think you can't learn with all the help of avast users here...
Sounds interesting, im happy with sygate right now, but i might test it soon.
--lee