Hi,
I installed it today. Never used Comodo firewall before. So I can't compare with the loved 2.4. version.
As a new user, I'm not frustrated to not recognized the old GUI as some does... It took me some minutes to discover the 3.0 GUI and to quickly understand the philosophy behind.
Since several years, I tested several personal firewall, and I must say that this one is note the easiest, but the worst in term of ergonomy, but it is the most powerful !
It is quite intuitive for an advanced user who now what really a PFW and Defense + do. I really love it !

Defense + is very powerfull, but it is probably to complicated for many people.
I would certainly not recommended CFP to a lambda user. It is far too complicate.
But I really think that it is impossible to reach that level of security transparently, that's why some other products reduce the security level, or worse: sell them with a default security level near 0 ! In this later case, the customer think he is in security though he isn't !

Comodo goes in the way I think, all vendor should go but hesitate to do so...
Despite CFP is almost for experts, I really think that reported messages are clear and didactic ! It' is something very uncommon, so it is worst to mention it ! Someone with at least a minimum of interest can learn a lot by reading these messages ! I really appreciate !

The only disapointment after one day of use, is the "help" bug mentionned by some others in the bug reports.

I hope that the fix will come soon...
I use it with NOD32, and a Forticlient (only ipsec VPN installed) on a XP SP2 full patch.
No problem.
I tried also the Comodo TrustConnect (openvpn), no problem either.
Again thanks for this great product !