What Exchange do you use and why?
What Exchange would you recommend and why?
Any complain about some exchange?
Any Exchange has give you problems or difficulty with to withdraw your money?
Same as the others, my favorite exchanges are Bittrex, other option i put trading on Indodax and Poloniex.
I wouldn't recommended any exchanges, because different exchanges has advantages and lack of point from fees, support, etc.
I will avoid put my asset to do trading on Yobit and HitBtc, many complains about them, so better not to joined or regret later.