I currently use a different Agile tool and I often compare it with others such as JIRA and the associated tools. However, in order to really evaluate Atlassian one needs longer than 7 days(30days is no better). It's a pathetic amount of time to try a make such a large decision. One has only just scratched the surface and then the trial is over. Can you not just create a introduction plan that allows up to 3 users full access to everything with a limited amount of storage for example. This way, we could try it out in anger and make a proper informed decision. If it takes 3 months, so be it. You'll get more customers that way.