Dex = Decentralized Exchange.

Went you can control all of your assets from the fund and transaction since it's a decentralized exchange you can do a transaction without doing a verification (KYC). Also you can control the transaction fee by your self, being a taker will always get fee i suggest you to be a maker instance a taker.

One of example decentralized exchange: IDAX or Bancor Network.

It can be an alternative, you should try it. Since you control all of your funds by connecting the wallet just make sure you know what are you doing.