I had Norton Firewall 2002 and it had a FEW issues... using some programs it would just crash the firewall.... no matter what... one was a webcam software.. no matter what i tried the firewall would crash... the other issue was with multiplayer games... couldn't use the in-game server browser in Quake 3 with the firewall on.. even though the other computer had perfectly fine access for everything else.. only one computer could get online (I have ICS) those are definite flaws, i spent hours working on the config but neither of those problems ever got sorted out... other than that, the firewall works good and blocks alot of different types of attacks and things. overall i'd still recommend it.