Alas, logging is how I guage the effectiveness of a firewall. If I cannot monitor that it is working as configured then I have no assurance it is indeed working as configured. The lack of adequate logging is why I've abandoned other firewalls.
Yeah, logging is pretty much a deal breaker for me too. I never used CFP2.4 and don't use CFP3 on my XP machines or other Vista computer. Liked Kerio and Sygate and their logging for XP, now using OA free on one (rarely used backup) and ZAF for my wife. Second Vista computer is just running Vista firewall for now until I decide to try something new. Maybe OA for Vista or the rumored Avast! firewall will be a better fit to it. That computer is mostly used for navigation on my boat, limited email and web, so not willing to work through a second set of CFP3 issues on it. Have CFP3 working well on main Vista computer, BTW; just try not to think too much about mysterious things that happen.

But finding user problems is significantly complicated by inability to log.