Jarmo,
Filseclab is fully mature, this is an upgrade from version 2 released last year, it features excellent logging as well as good rule creation, it like Kerio is not a component control firewall so Antihook fills that void nicely. Also features regular upgrades of port blocking, ad blocking, trojan and worm blocking as well as flash media blocking rules which gets upgraded from their server. Best thing is that the devs respond to your queries.
It will remain free, the source code of the version 2 is for sale.