IDEX is the first Ethereum based decentralized smart contract exchange to support real-time trading and high transaction throughput. IDEX is the most advanced Ethereum DEX, supporting limit and market orders, gas-free cancels and the ability to fill many trades at once.
Guys this is my personal opinion, idex is much faster, you can adjust the gas fees to min as possible, transaction very fast. Very light compare to etherdelta.
Its worth to try.
https://idex.market/faq
almost all popular pair available
https://idex.market/eth/btcm
https://idex.market/eth/rz
https://idex.market/eth/ebch
https://idex.market/eth/eos
https://idex.market/eth/eagle
https://idex.market/eth/snt
https://idex.market/eth/kick
You're right it's much faster compared to EtherDelta, almost instanteneous. But I there's hardly any volume on IDEX (7,000,000 USD vs 74,000 USD).
I'll check back in a few weeks to see if there's more action, because there is a lot to like.