HitBTC is an exchange that guarantees users fast and smooth order execution, top notch trading terminal, highly competitive liquidity when compared with other exchange platforms.
It runs on an exchange API called websocket, FIX API and REST are rated to be very fast and efficient especially when it comes to fastracking real time transactions. Its API also has low latency data exchange fees.
HitBTC is a fast growing Crypto exchange since 2013, with state of the art security system with 2- factor authentication features and cold storage, with which it assures you of the safety of your digital assets
With my rich experience with exchange platforms I can tell you that HitBTC is well equipped with detailed audited cryptography scheme with a fee tier that's low to give you that best trading experience at price you can afford.
However I will rate it low when it comes to its customer care service which is largely characterised with poor response. Aside this if it is fast and reliable exchange you are searching for, I think it ends with HitBTC.