Obviously I can google this, but I would just like to hear what you guys have to say as those articles are outdated and may contain irrelevant information.
I used several exchange, because basically I do arbitrage, mostly altcoin, but I often used poloniex, bittrex, cryptopia and bleutrade.
be very careful when using one of these big exchanges such as poloniex for day trading and having short positions which you would like to liquidate as fast as possible by executing an order on the spot. because they go down or become drastically slow in times of high activity and you can easily lose the opportunity to sell because their servers can not handle high traffic!
That's need to consider.
But, professional company should know how to manage their business, it's means if they traffic growth higher, they should upgrade their server and warn to their users before upgrading implemented.