Team 1515 uses Autodesk Inventor. Great piece of software in my opinion. I gave SolidWorks a spin in the summer of '09 and it really didn't suit my immediate desires. I found the content-center to be less than complete, and (I know this is a terrible reason to choose a CAD package) the graphics quality is far inferior to that of Inventor. I'm not sure if this has changed since then, or really what SolidWorks really has to offer now. I haven't used it in nearly two years.
I have also come to use and love every one of the Design Accelerators built fluidly into Inventor. Never again will I manually CAD a chain, a pulley system, a gear, a nut and bolt. Inventor fluidly integrates everything a designer could need to design and present his system.
Anyways, that's enough of an Inventor promotion!
