Our first project went live over the weekend and I am waiting for the first users to log in. The project started in March and comprised 12 sprints to deliver a UX application to allow users to capture and report on tasks related to property management.
We used the Next-Gen version of JIRA. This is the first time I have used Next-Gen and the features I liked best are the ability to click on a profile icon on the board to just show tasks assigned to that user, and the Excel JIRA export tool, which was invaluable for helping order the Backlog.
I find the Next-Gen interface much cleaner than the classic Jira (v8.3.4) which is being used by another of my teams.