Checkpoint's Firewall One is a very powerful Enterprise solution. I was privvy to it a few years back working for a car manufacturing company in the UK. The IT dept. catered to 1200 windows based users as well as 300 or so mix *nix clients. It was one of the few products I have come across that lived up to it's name.
Let's hope Checkpoint can do similar with ZoneLab's software. Although the Pro version has had great reviews their free personal version leaves much to be desired with many people asking me for alternative free firewall software. This is by no means saying that everyone feels that way towards the free product. But it does raise the eyebrow...
As free firewall software goes I have found in my experience, out of those who were unhappy with zonealarm freeware, most [point and click users] were comfortable with sygate's free firewall.

http://www.sygate.com/products/spf_standard.htm

I'll be watching Checkpoint over the coming year.

Kwi