The ease of use and the speed in which it detects threats. It is very intuitive and easy to set up and configure. I have not found anything that really has me frustrated at this time. I am still getting used to it but I feel like it's going to be something we can't live without. We've had so much trouble with our firewall before, I feel like this will help us immensely. I don't think there was anything about the product that really put me off, it's just been an overall great experience. I highly recommend and would recommend anyone looking for a firewall/antivirus solution to give it a try. Security issues.