Very well written user manual but perhaps could add even more details. Note: PPTP VPN to a Microsoft server may not work if firewall is on. I'm not certain Firestarter is responsible for this or not but be aware of the issue.
Well, it's outdated and no more supported, developers dropped it. But firestarter is awesome.
I prefer this to the default firewall configuration tool, its easier to understand and the beginning set-up wizard is helpful. I do wish it could be set to run on system start more easily.
When not capable to configure your own iptables it's a good alternative. Still, manual configuration of iptables is safer.