At first, I wasn't sure what to expect when I went over to the site myself, but then I realized that this would be a good resource for a math class, much like the one that I'm in (Math for the liberal arts student). I browsed through most of the links, and it provides a lot of information from what you can do with math, to new maths being discovered, to small math, and there is even a resource for teachers to use.
The content is not educationally significant in regards to learning certain math materials, although there are links that take you to sites that do have things like that. The forte of this site is not in how it teaches you concepts, but how math is related to us and our surroundings, including the ones that are solved and/or unsolved. It's effectiveness can help inspire students to be more interested in math and pursue a higher education in math. It is a lot easier to teach a student who have a desire and interest in math than a student who does not. This can be helpful in that sense.
In terms of ease, it's very simple to navigate. The sections are clearly indicated for those browsing, and its not boring-looking at all either.
The website is quite innovated, and can inspire and interest students in math who've never had it.