About smoothwall

i recently saw an answer to someones qtn about having a linux “nat server” and he was given smoothwall.org as an answer. i checked out the site and it was like an answer from God himself.. that what i have been looking for i am puttting together some pentium II junk i had lying around for testing the software. then i can go install it on one of my clients sites. is there anything i neeed to know about smootwall apart from it being the answer to my prayers??