The site is clean, unpretentions, but clever. The sticky header works smoothly without me really noticing. There is nothing that distracts the user while being on the site. The colour scheme is gentle, although, for my preference, I would have picked a less lime green/yellow colour.
Most importantly, it tells you what it does, what you can do next, and what other possibilities there might be. It does this clearly and without being in your face. That is critical. It is thinking of the user and how they want to use the site, not just how marketeers want to present themselves.