RECOMMENDABLE EXCHANGE

[apoteos]

I've been using COSS and Kucoin myself. Not bad but they have low volume still.

[Queen999]

Poloniex, Bittrex and Etherdelta are best 

[iancortis]

i also use bittrex and binance, etherdelta not much easy for everybody, but it has a small fees and it convenient for many users. i also use poloniex before and maybe im lucky that dont have any problem for my transactions before. because there's so many pending and stolen balances their accounts before. i think they fixed it already.

[erikalui]

Poloniex has the least fee and is probably the best exchange (although sometimes their withdrawals and deposits take more than the required time).
Hitbtc is my favorite as their withdrawal fee is 0.0004 (reasonable), they have no limits set on withdrawals unlike Poloniex which has a limit of $2000. Withdrawals/deposits go through fast (unless there is some kinda maintenance work going on).
Mercatox. Their fee is high but their volume is quite good. They have a limit of 1 BTC set though.

[Tosyn2]

I use bittrex, Binance, liqui and coinexchange but i use bittrex often.