The car for this year is almost completely modeled in CAD. With a fairly major redesign, CAD has been an invaluable tool in making sure everything packages properly. Packaging is a major part of vehicle design, and CAD allows us to put everything in its final position, visualize how parts will interact, and allow us to check for clearance/interference before we actually build anything.
In addition, modeling parts I think has been a good way for newer members to get experience in Solidworks, and some of their parts have made their way into our full car model.
See the new render video here. (For some reason the compression on the embedded video is messed up for the first portion of the video - download the video to see it in its full glory)