About 3 years ago I was using ZA and I uninstalled it for some reason, only to discover that my Internet stopped working. I didnt make the connection until i reinstalled it and voila internet was working again. I've avoided ZA like the plague ever since. Tried outpost for a bit, but after 2 years of never upgrading it, I switched to kpf for a bit but it was still beta and buggy, decided to give sygate a shot and have not looked back since. I gave Outpost pro a shot recently but it allowed certain things access to the internet without prompting and even worse, blocked other things without prompting. Back to Sygate and I'm happy for now.