We've recently moved from Pivotal to GreenHopper (Jira) and every single engineer wants to go back to Pivotal. We've given GreenHopper a couple of months to give it a fair chance, and in every way it's clunkier and more confusing than Pivotal.
Just curious, what were the reasons you decided to move away from Pivotal? We're looking for a new project management system and JIRA is one we've been looking at, but on first look, it does seem like information overload.