I used it to do the initial configuration on my Pix 515.
It is a bit like the GUI client that comes with Checkpoint Firewall-1, which I have used a fair bit, but operates though the web browser instead. At this stage of it's development (version 1.12) it has some drawbacks.
1. It doesn't handle VPNs at all or any sort of encryption setup for that matter.
2. It is designed to use access lists rather than conduit commands although it will parse a conduit command however it tries to interpret it as an access list command.
3. It doesn't seem to cope with applying an access list to more than one interface and does strange things if you do.
I think it will be really good in a couple of versions time. It is very good for doing the initial configuration, naming interfaces, putting in hostnames, ip addresses, routes, setting up syslog etc.
My 2 cents.
Regards
Rob