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Can you name it? Coz I am satisfied with it at the moment but definitely want to know what the major problems are, would consider switching if the problems affect me. Also, which exchange platform do you prefer? Any comments on Cex.io., I feel like they are pretty good but transaction fees are high

I've already answered this point multiple times:

https://steemit.com/cryptocurrency/@thecryptofiend/poloniex-is-basically-broken-these-days-how-long-until-people-stop-using-it

The withdrawal eventually took 5 or 6 days. Since then they have also removed the troll box:

Screenshot 2017-06-07 12.47.54.png

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