Actually I have tried WFC in the past but i rarely feel the need to block certain soft coz i moslty use the well known soft all the time so it reduces the headache and for me default WF is fine to me as i don't usually make a lot of rules
That's totally understandable. Creating rules can be as much of headache as paranoid it sounds.
But a control can prevent cases where some rogue or normal apps try to add their own exception in WindowsFW without hinting. If that app is malicious, a Trojan or so, that's unfortunate..
There are also some FWs available that can be easily trained without those black and white rules-creation efforts, covering all processes.