It has some little futures for calculating areas that Autodesk could learn some lessons from. What is so good about CostX is that a large amount of the QS firms in Australia use CostX.
For us (Revit Users) the only important thing to do is to give your QS 2d DWF files over PDF or DWG. Ensure you tick the options box for export object data for model elements. CostX does not recognise rooms yet. It is another great reason to start using DWF files.