As Jedaisoul said, it's painful to watch load -- and really it is chock full of accessibility issues and bad design choices.
One of the worst design choices is that "parallax scrolling" nonsense, that just makes sites harder to use no matter how "pretty" an effect it is. Likewise doing sites that way dumps WAY too much content into a single page -- or worse spreads it out so much that visitors cannot find the forest for all the trees -- and of course the speed penalty of swapping out those massive background images sure doesn't help.
Accessibility issues abound -- the ultra-thin webfont is effectively useless for me even when zoomed in, and I DO have to zoom thanks to the undersized fixed metric fonts. There are several sections like the menu or that "sky's the limit" parallax block where the color contrasts are far below accessibility minimums -- I couldn't even see there WAS a menu at first. The contrasts need to be even higher too when you have alternating dark and light backgrounds, as when most of the screen is white, that black menu bar becomes invisible. (Google fell into this trap a few years ago, and finally gave in to complaints about how useless it was -- finally kicking to the curb their "design experts" claims of how much more important "style" and "art" is.)
The speed problems are simple - it's FIVE MEGABYTES in 42 files... to deliver 5k of plaintext and maybe a half dozen images that I'd even consider to be content. That's easily 40 times larger than I'd allow an entire page on a site to reach (not counting social media plugins) unless it was something like a gallery of three or four dozen thumbnails (in which case it's only five times larger).
Between the massive images for nothing, massive scripting for nothing, and "gee ain't it neat" design choices, it's a slow loading usability mess. Even the heading orders don't make sense, which is laughable on a single-flow non-columnar layout. Multiple H1 that don't even follow the (rubbish) HTML 5 conventions, empty H1, h4 without h3 or h2 before them, you pull up a document outline and it's non-navigable gibberish.
... and that's before I even look under the hood at the markup.
Though to be brutally frank, it's very much what I've come to expect when I see a HTML 5 doctype, jQuery, and the train wreck known as bootstrap. It reeks of focusing on form instead of function, and it's really just a laundry list of how not to build a website because of it. It's slow, it's hard to use, it doesn't gracefully degrade, and it has major accessibility failings.