Ford uses IDEAS???!!! I did a whole year on that program at uni and I thought it was CRAP! So hard to use. It doesn't like complicated objects unless you do them a certain way. And the way it works seems to change all the time.
Solid Works I find is sooooo user friendly. I can learn it just by stuffing around with it for a little while.
EDIT: And, I forgot to add. AutoCAD is extremely good for CAD (Computer Aided DRAFTING) it is not so good for CAD (Computer Aided DESIGN).