I only have great experience using Coinex. No kyu and fast deposit and withdrawal. Also I think withdrawal fees are lower compared to Binance for example. Here is a referral code in case you need one.
https://www.coinex.com/register?lang=en_US&refer_code=eturz
I messaged them about a deposit that wasn't credited and this was their reply
Dear user
Thank you for your inquiry.
The wallet is currently under maintenance, and there would be a deposit/withdrawal delay.
Once the wallet resumed normal service, your deposit/withdrawal will be successful.
You may also attempt to the wallet page and subscribe to get maintenance updates. https://www.coinex.com/asset/withdraw?type=ERG
Sincere apologies and appreciation for your patience.
If you have any further questions or concerns, please don’t hesitate to contact us.
Kind regards,
Customer Support - CoinEx