It brings an un-precedented traceability among Subversion and JIRA
All the web applications that you need bundled in single add-on
One click installation from the Atlassian Marketplace
Fully integrated out-of-the-box
It shows commits related to JIRA issues and projects
Browse on Subversion just right inside JIRA
Make powerful JQL reports using Subversion attributes
Track the activity along the time of items, developers, projects and issues 
with interactive commit calendars
Full commit graphs with forward history and support for issues