I cad bad experience with those from your list
Hitbtc
Cryptopia
coinexchange
But Hitbtc and Cryptopia made many changes and improvements in last 3 months, so I'm using actively them again. I'm still avoiding coinexchange.
Fortunately i did not feel bad experiences on these exchanges in talking of services but only the fees. Like Hitbtc in which you need to pay the fees when you deposit your coin into their site then cryptopia is much expensive too during withdrawals but security features are better on these exchanges only the fees is much expensive so i suggest Kucoin.