I like how easy it is to set up, configure, manage, monitor (via mobile app), etc., as well as that there are multiple providers in this space with different features/pricing models.
The ability for users who don't have technical skills or experience managing servers can easily do so themselves via an intuitive web interface. It's not perfect--it could be easier to navigate when you're working from your phone vs desktop computer. However, once we got used to the UI, everything worked great! We've been able to save money by using fewer physical security personnel than our competitors while still providing 24x7 coverage of all areas around campus.