My personal opinion of the website is that it is nice. Components or widgets are separated or defined differently enough for you to not confused, or make it seem cluttered. The completely white background is currently following a trend, where everything is white with the components are being layered with box-shadowing to add emphasis. Also helps with the coloring they chose, as it stands out well against the white.
One of the major tips this site doesn’t follow the book mentions is that buttons should change color when your cursor, to identify that it’s a button. Now even without it, I found no trouble distinguishing what was a button or not, or even link. I am not totally sure I agree with this tip 100% of the time.
Another major tip this book gives is that you should we weary about drop-down menus. I think at least more recently, this tip is not useful. I am not sure of any major website that doesn’t utilize at least one, as it majorly helps with categorizing pages and or posts. This website has them, and I find they work well, as well as it allows them to keep the main navigation clean and free of clutter.
The other tip I really don’t agree with is that you should always include your home page in your main navigation. Reason I disagree with this is that it’s becoming a trend to remove the home button, and just using the logo to go back to the home page or to have breadcrumbs on the pages. Not saying to have the home page is bad, and most of the time....this tip is right. But sometimes its just as good to not have it as it is. Depends on the design. This design utilizes it.
Overall, I think this site does a good job of layering it’s components and separating things. They are consistent with the font around the site, as well as color and layout. It’s a nice site, and people needing insurance will find it easy to navigate. Maybe that helps them be the number one dental insurance company in the US and Puerto Rico?