Well it was fine when it was called by its other name, CyberHawk I believe, so I doubt that will have changed just because its name has.
It is preferable to have a multi level/application approach to security as one program is unlikely to give 100% protection.
I just use avast and the other applications in my signature, I considered cyberhawk but never got round to installing it. I take other precautions to limit the potential for harm with 0 day attack, namely restricting the permissions (no admin) of the applications that connect to the internet. That doesn't use system resources but helps stop files being placed in system folders and registry entries be created because malware would inherit your logon account permission.