I like the fully automated continuous discovery run by ImmuniWeb in the background. We do not need to rerun the same tests or the same scanning against our resources. We need to supply our IP addresses, domain names, and significant resources with special domain names and URLs, and we need to do it only once. Then we always have an up-to-date picture.
I also like the integration with our single sign-on system. We do not need to maintain a separate set of usernames or user accounts. We can plug this ImmuniWeb service into our authentication technology, enabling two-factor authentication. We have secure authentication right out of the box.
The other important feature I like is the executive view. You can easily switch from a technical view to an executive view and have a helicopter view of the compliance status. We can see how much effort is required and our current status.