What I love is being able to ensure complete traceability between requirements, risks, verification/validation activities, and design deliverables. Creating a common library between projects facilitates impact analysis during changes. The review mode allows for comments and faster exchanges. You can quickly create a new project and reuse elements from existing projects. Review collected by and hosted on G2.com.
The review mode is somewhat limited in terms of display; for example, it's complicated to get an overall view of a risk analysis. Relationships between items can be created quickly across multiple items, but when you want to delete them, you have to do it one by one. Getting started takes time, and some workflows could be more intuitive. Review collected by and hosted on G2.com.