This is great! The last time I started a large project I went with JIRA because of cost constraints and FogBugz lacked the Kanban boards and workflow features. JIRA is super flexible and it continues to improve but generally it's just good enough to make you stay. It is by no means excellent and it certainly is not software that I'm happy when I'm using. It's great to have an alternative from Frog Creek that is price competitive - I've had nothing but positive experiences with them in the past and Trello is obviously great.