I'll start by saying that I'm a new user to the Free ZA, although I used long ago, I am returning to it with a win7 x64 machine and MSE as my AV.
My main concern when installing a firewall (besides the "free" status) is speed.
I use my machine a lot for gaming (lan and online) and I have a lot of multimedia that I stream to an HTPC so network speed is the MOST important thing a firewall must give me (alongside security).
I know how to configure the windows firewall to a block all status and then create rules to allow programs as I need, but since I'm not the only one using the PC this is not an option for everyone so I must choose a firewall that will give me outbound alerts as they happen.
How is ZA today in the speed area?