Aside from the integrated approach to risk management, the interface is clean and easy to navigate which helps me immensley because I'm a visual person.
C1Risk is a well-designed tool that can be adapted to your needs for all GRC tasks. It allows us to track both our accepted risks (risk register) and our risks that we are working to remediate/mitigate. It is a powerful tool that can map against a large library of frameworks, assign tasks to users, and document evidence for controls. What I like best though is the customer service. If there's something that you need that the platform can not currently do, the team is very willing to assist and accomodate.