Bancor is like a decentralized exchange, but with a different operation. Well what I realized of advantages is that you can trade between different platforms in a single click, yes within the Bancor Network, you can deposit ETH, BTC among many others and trade directly with other users for Bancor tokens, BNT tokens without bureaucracy, everything simple and fast. But Bancor only supports cryptocurrencies, it does not have support for fiat currencies, maybe a negative point, because then you first have to buy the digital currency that you want to trade on the Bancor platform and then exchange it for any asset including BNT within the platform. An easy and pleasant option, but only for trading between cryptocurrencies, perhaps the team at Bancor in the future might implement support for fiat currencies.