There have been many previous attempts to make decentralized exchanges but the ideas were great and they also got the funding the exchanges also launched, but those exchanges didn't got much attention, so trading wasn't possible on those exchanges as there were sellers present there but the exchanges lacked buyers as most of the people are happy with centralized exchanges like bittrex, Poloniex, kraken etc. But I wish good luck to the project in the crowdsale and I hope the project is a success as decentralized exchange is the need of the hour as a lot of exchanges are being hacked due to someone else's errors and we are losing our money in the process.