I'm trading on CEX.IO, and I'm quite satisfied with this service. However, mind that it has quite an extensive verification process. But it only proves that this exchange really cares about the safety of clients and their personal information. Moreover, they keep on improving their service and the platform itself. And a few months ago they announced the launching of CEX.Broker, https://cexbro.com/, which allows trading with 10x leverage on BTC, ETH, and LTC.IMHO, that's a sign that a platform doesn't stay still.