Similar Issues Finder Plugin targets to minimize number of duplicate issues within JIRA. Each duplicate issue takes precious time of its reporter, assignee, management and QA teams without any significant benefit to the end product. For a 500 employee organization saving 1 minute of each person a day will save nearly 3 months each year. Even a single duplicate issue may easily cause hours unneeded work.
You can try most features of "Similar Issues Finder" on our demo site. You can login with username "demo" and password "demo". After logging in you can navigate to SITP-13 to see similar issues to it. This project has some preconfigured issues. You can create new issues to test similar issues behavior. This user does not have permission to modify global settings of similar issues. If you want to test a specific setting please let us know.