Looks like they gave their navigation bar more visual weight by darkening it. They're following the convention Facebook is using for their nav bar, which I lik

Looks like they gave their navigation bar more visual weight by darkening it. They're following the convention Facebook is using for their nav bar, which I like. There's a logo, search, and utilities. This helps because many users expect the navigation to be next to the logo. On a behavioral level it creates a sense of comfort by establishing the security of routine/familiarity. The downside/trade off is by placing the elements side by side instead of on top of each other, it reduces scanability. A lot of drop down menu options. Amazon does a good job with information scent and progressively disclosing more information in the drop down. This keeps the page from being cluttered and helps people navigate to their goal locations quicker and easier. I like that they have the prices for their products right out front. You don't have to read more to find out. They give the people what they want to see right away. I could go on with analysis of the design but now seems like a good stopping point.