This acquisition makes total sense; Trello and JIRA target mostly non-overlapping market segments and there are some easy low-hanging integration fruits to be picked. I'll also bet Trello becomes a deal-sweetener going forward. License JIRA and for +15% you also get Trello for your whole company.
https://trello.com/b/gHooNW9I/ue4-roadmap
I know a lot of smaller dev teams use it for lowercase-a agile projects and I currently use it for all my personal projects. It's basically the antithesis of heavyweight tools like Jira.
What was your experience like?