At a glance, I'd be unclear on what set of scenarios they expect the site to help out with. The person would need to type the right search term and hopefully land on the right result. If they wanted to use the navigation, it seems hovering over the menu items doesn't show you the structure of the site-- you need to click into each individual tab. It's pretty but hard to gauge how useful it is.
Honestly, love the design, few location that will need accessibility and bug on overlays and a few margins, browser stack or something similar in testing by your QA engineer all full cylinders.