They didn't spend any time making it look pretty. Atlantis uses a web framework called Bootstrap: http://twitter.github.io/bootstrap/ So does Sheep marketplace (sheep5u64fi457aw.onion). Some people claim they are run by the same person because they look similar. No, they just use the same web framework with the same basic theme. blockchain.info also uses Boostrap. Notice how the buttons and other elements look similar on all three sites? How is the Atlantis difficult to use? It has the same basic functionality as SR, plus sort by price.