I test drove it a few days ago. I really liked the UI (with keyboard shortcuts!) but found that it really didn't add value since we already use Pivotal Tracker

I test drove it a few days ago. I really liked the UI (with keyboard shortcuts!) but found that it really didn't add value since we already use Pivotal Tracker. PT already has a notion of the story you are working on along with tasks for each story that you can quickly create and check off as you complete them. The group chat feature feels pretty simplistic and isn't even in the same ballpark as Campfire or HipChat. It's a promising design and feature set but still needs a lot of work to justify the high price.