The one thing that has always impressed me about Vue from the start, is that the product was designed from the "Outside-In" versus the "Inside-Out" meaning that the GUI and Useability is a primary design consideration.  A novice can learn Vue in a couple of hours - and an expert can learn it in a few minutes.  Compare this to other apps out there like Z-Brush which has to be one of the most poorly designed graphics apps ever created.