The fact that those two guys aren't arrested plus lack of simple explanation how they intend to anonymise bitcoin indicates their software simply aren't effective and how can it be lol
Every transaction is recorded in the block chain. Yet no one knows id of wallets. So in effect u can wire yourself BTC and claim someone sent them to you, and so on

It is open source, there is a great explanation in the code and elsewhere.
It does a lot of things including helps to prevent white and black listing and makes tracing coins much more difficult. In short it helps to protect privacy.