As this is my first post, you have no real reason to listen to me. All I can say is that I am reviewing from a consumer pov, rather than that of a designer. I noticed you had no replies, so I thought I'd give it a shot. The navigation was great. I had no problem exploring the site and finding the product pages, etc.
I should tell you, though, all that flash may look cool, but it literally gave me a headache. Some may like it, but I tend to look for a "Skip" button when I get to a page like that - it would be great if you had one!
Overall, very pertinent and professional. If I were in the market for truck accessories, I would buy from them.
Maybe since I brought you back to the top you'll get more feedback!
CiCi
http://www.metrorichmondrealestate.com