Weekend Learning: Total Session History utility

I cannot wait to get my hands on Chris Craft's new utility Total Session History which is supposed to combine AWR (Automatic Workload Repository) and ASH (Active Session History).  This utility is targeted at Exadata platforms to give us a complete look at everything that is going on in our systems so I want to dig into this to see what I am missing right now in my mental picture of what our system is doing!  If you have a chance to use this before I do next week, let me know what you think in the comments!