JExcel is definetly for you if you have JIRA Core or JIRA Software licence and ...

• are just getting to know JIRA

• are heavy users of it but

  • use Excel and JIRA simultaneously

  • miss some Excel-specific features from JIRA like

    • an Excel-like view of their issues

    • an Excel-like way of creating and editing issues

    • importing and exporting their issues from/to MS Excel

    • copy-paste (also to/from MS Excel/Notepad)

    • an Excel-like way of filtering and sorting issues (without JQL knowledge)

    • seeing the Average/Count/Sum of the selected cells

    • column renaming

    • column freezing

    • tab coloring

    • row flagging

So, JExcel is basicly for anyone who has to deal with issues in JIRA.