I too discovered W7FC and here are my comments:
a) the free version is very easy to use but it really is not adequate because it only allows "accept all" or "refuse all" options or allow in or out. No zones and no logging.
b) I (very briefly) tried the W7FC plus version and found it a little too confusing (even though I had used Zone Alarm for years in XP). Maybe I did not give it an adequate try because it was so brief a try.
c) in doing this I discovered that you must totally
uninstall the plus version before re-installing the free version. Otherwise you get problems with blocking of ivP6, etc. I had wrongly assumed that because they were the same program one did not need to do so. Wrong!
I'm no expert in this but wonder
1) With Microsoft being such a target for attack, is it a problem that W7FC uses the same underlying engine as Windows 7's own firewall? Would be better to go with something like Comodo (ZA is getting a little long in the tooth) that is totally independent - always using a custom install and unselecting unwanted toolbars.
2) How important is the presence or absence of a HIPS module?
3) Other than avoiding the unwanted toolbars, is there any problem with Comodo free in W 7 ?
My 2 cents.