I did for a bit, mainly because of the fact that every so often comodo encounters some visual C++ error and crashes. Once this happens, I have noticed how all my rules get wiped which does get irritating. When I try the diagnostic tools built into the program it did not find a problem so I simply moved to pctools firewall plus for a while. Recently with the 'create rules for safe applications' program, I have been able to somewhat bear the popups generated but the error still occurs. However, I will probably move again once my ISP moves to IPv6 unless comodo decides to implement full ICMPv6 support.