On our team CAD gets a lot of respect, but barely anyone knows how to use it.
This was the first year in quite some time that our team designed the entire robot in CAD. The funny thing was... well... we.... errr... designed the robot after we built it... yeah...
The reason? We wanted to try out for the Autodesk Inventor award and also hoped to put the drawings in our publication (if we won it).
This may sound silly but you wouldn't believe how much I learned from this project. If you really want to learn Inventor sit down and try to CAD something that is already built (also keep a pillow handy to punch when you get frustrated

).
Check out the bot!
http://www.team100.org/about/autodesk/robot/robot.php