I think what I like most about this design is that it’s “flat” – just kidding. Was that funny?
Seriously, what I like most is the vertical rhythm of the site as you scroll down. The way the pieces of the layout are positioned feel very nice and weighted just right. Especially the fixed header which just had the call to action and login links, it kind of bounces down in almost the same cadence as the rest of the page visually has. Kinda badass.