It has glittery design and you hear celestial songs every time you make a trasaction.
But, seriously, what the hell do you need? Multi-signatures is a new revolutionary technology, it was discovered a short time ago and Bytecoin already implemented it! Keeps your money safe and sound. Isnt it enough?
Are you fucking retarded???
You need to clue up on your history: http://www.coindesk.com/year-multisig-so-far/
The first multi-sig transaction in Bitcoin was in block 170052. That happened in 07/03/2012. Bytecoin only got around to adding it now, and you're saying that they "already" implemented it? What a joke.