I've been using the Bybit exchange since January of this year, and out of the exchanges I've worked with before (HitBTC, Poloniex, EXMO), Bybit seems the most reliable, especially when it comes to the speed of withdrawals. They are great guys, they work honestly, the support is top-notch, and most importantly, there are no outages. Bybit is the first exchange in the world to offer derivatives based on XRP/USD, EOS/USD, and ETH/USD. Good performance, a smooth and intuitive interface, a mobile app, professional trading tools with built-in TA tools and indicators, leverage up to 100x, low fees, no verification required, and an excellent API for developers.