IDEX is a great DEX. I can tell you that from my personal experience, it is way more responsive than etherdelta. They also have a special coins that give you a discount on your trades and they are also paying dividends. There is also a cryptobridge exchange but mainly for master nodes.
IDEX was great.
After PundiX passed 5000 ETH in volume, IDEX is in a complete collapse from 48 hours. Even when the site is reachable, I can't put an orders in 9/10 cases 'Due maintenance' or time our or whatever.
IDEX clearly shown that can't handle volume and many clients. I hope that they are taking those problems very serious if they don't want to follow Etherdelta into oblivion...
