Ease of use; it's like having an extra set-and forget firewall! It can block any kind of incoming mail (even those you didn't even know were coming) without asking for permission first - very easy peasy when this product was designed by someone who knows what they're doing. I would not say there are too many downsides as far as functionality goes but if i could think up something then maybe making log view more user friendly? Maybe have some way so people don'T need to login all time just check logs sometimes instead of needing them every single second?! Not much else really apart form being able to easily see why specific mails got blocked etc which makes troubleshooting easier!! Great tool overall though especially how simple setup / management process has been once running properly compared other products we used previously where things always seemed difficult/complicated. I like the ease of use of the software. It's easy to set up and configure, and it's very intuitive for even inexperienced users. It does not add much to the system resources. It does what it says-protects against viruses, phishing attacks, malware, etc. Nothing. For me, this is one of the best antivirus software for business. It provides excellent protection without adding too much to the system resources.