One word:Extensive.
But I wont agree with you on one point.
Windows XP comes with a built in Firewall to protect your computer, but its not a worthy solution when compared to a standalone firewall, so I will skip that in favor of a third party firewall solution.
I've seen quite a number of posts in the forum with threads such as "which firewall do you use?" & people bashing windows firewall for the simple reason that it doesnt offer outbound monitoring.I say if a person has a fair knowledge about what goes at the OS level,what applications he wants to run or to simply put knows what goes in his system then why does he need a separate commercial firewall?
Most of them bashing the windows firewall use a commercial firewall which is not configured properly & it sit there hogging valauble resources.I'm not saying windows firewall is better or the best but the description of the windows firewall ought to be w.r.t the requirements of the user & his qualifications.
So you mentioning "not a worthy solution" naa doesnt do justice.Just my 2 cents.