That page causes Chrome to lag. I would also say that if that page was any longer or any more information dense then it wouldn't work as a thing. It only works because there is so little content. In general it depends what you're trying to sell. I've never actually purchased from one of these "flow" pages, but I have purchased a lot from more boring product pages like this: http://www.linode.com/tour/ The OP's sales…
That all said, I want to take anything away from this guy, he's done a fantastic job and deserves recognition.