I like that it's easy for me as an admin user to set up rules in order to protect my site assets by blocking certain file extensions or MIME types.
The UI could be more intuitive. It took some trial-and-error before we realized we needed specific rule sets/filters instead of just using "all" which seemed too broad at first glance. There are many other options out there but this one has been working well so far! We're protecting our website files (images) against being accessed outside of our office network without proper credentials.