Maybe it is just the installations I have had to use in the past (Possibly installed on slow computers or requiring too many custom fields etc) but as an issue reporter I loath JIRA as a slow and clunky issue tracker which also makes finding issues annoying.

Maybe it has wonderful features for the developer side but I haven't used that part of it so I cannot comment.

Whenever I go to report a bug on a project and find out they have JIRA I shudder.