Our use case is internal CRM so our customer support department of ~900 users can see the progress of any employee anywhere in the firm in the clear without delay. Fast interface means ease of use which makes users want to file even the seemingly smallest idea so we have better feedback and nothing is lost. Significant integration (sso, Git webhook, etc.) means we've confidence JIRA will adapt to even future systems. Prospective employees often use it & thus no delay in their using the ticketing system with confidence. We considered Trac and Bugzilla but both are very old, no new features, barely any integrations, require custom hosting, etc. Trac is as basic as the subversion with which it's often associated in feature set, requires signifiant time and patience to set up much less customize/configure, and is being abandoned by most industry folks. Bugzilla is a classic solution which holds up, but has an interface which causes non-developer users to not want to use it. Interface counts for first impressions and confidence which are big, especially for non-tech departments of which most of ours are. Tech and customer support are fair for a service of this size with consistently earnest responses over the whole nearly 10y of our use of Jira, an impressive streak of non-variance. Our requests are namely reporting frontend bugs and quirks which are often resolved over time, usually a feature is deployed within a year of our suggesting, likely not as a direct result thereof but shows investment in the product, and bugs are sooner, within weeks which is fair given the immense global user base. We're pleased with the essentially included-in-price support. We use Jira closely with Bitbucket and Confluence, its siblings in the Atlassian world. Our primary project finds multiple issues daily due to the project's complexity in all senses: business-wise, politically, technically, developer resource constraints, time constraints, and limited intake managers. That said, we must be very efficient and judicious about how we file all the reported errors, new features, critical bugs, re-categorizing in between, etc. JIRA's great interface allows us to search and tag and make fast large-scale edits to this torrent of tasks to bring it into order. The public visibility and linking tasks also helps organizing such a large volume of tickets with so few people. Without JIRA, either people wouldn't be able to submit requests at all to a sane system or the interface would be so dissuading as to cause them to not speak up. JIRA is the tool to tame a beyond-human scale of requests. All in all JIRA's superb for a solid decade plus.