What is the coolest feature in AX2009? (personal opinion)

hardi

Here I want to share my personal opinion regarding the coolest feature I found in AX2009.. of course this is based on my previous client wishes during my past project.
Please share your thought / opinion...

-Purchase Requisition including Approval workflow.
Feature / function inside I like:
-Can define who can approve, set approval limit
-Requested items can be filtered to only certain item based on product group can be proposed through PR screen.
Why I choose this:
-80% of my implementation projects on former version 3.0 & 4.0 requires this funtionality and only able to achieve this through workaround and some MODs (in fact I am not a fan of so called "modification" :P)

improvement I wish for the existing 2009 PR module:
-Budget control such as comparison of current PR's budget to-be used, current budget standing on all open PO, current used budget (curr month/ytd) vs. budget

just my view