I have been using macafee for three years now. It has been nothing short of perfect. It checks not just for viruses but anyother harmful file like malware and spamware.. Plus its firewall is pretty good, maybe not the best but I like it, since I have a nice router setup I dont have to worry too much about my firewall service.
I've read a lot pro and con concerning McAfee. Strange how it works good for some and not so good for others. I'm just very unlucky when it comes to computers. If a certain program worked excellent for everyone who had it, you could probably lay down a bet that it would give me problems. Murphys law runs and rules me...which is why I don't gamble. :-)