I like it - the landing page is very clear and easy to use, the colors are bright and easy to see. The search feature narrows down to an exact area quickly. The site is probably one of the best car sites I have seen in a long time.
i don't like the gradient in the logo, may be make it more fine. the magnifying glass in the search box is not clean.
I like the clean design. It would be nice to put a tagline under the logo so visitors would see what this site is all about.