I've used Bter, Cryptsy, and Poloniex. Poloniex is by far the best exchange I've used. They emphasize security, and for traders, they offer built in automatic TA features. >>>> "Fibonacci levels, SMA, EMA, and Bollinger Bands"...  it is really helpful, and worth the value, IMO.  Also, which is very important, IMO, they do not allow 'Wash Trading' (trading with yourself). So the volume there is really a lot more legit. All these other exchanges, they have all this volume but it is easily faked, and can make a coin more pumped, when it really is not. You can't fake the volume as easily on poloniex. I suppose you could somehow if you had multiple accounts?   I mean, some of these other Altcoins, and exchanges, you absolutely cannot trust the "volume" since Wash Trading is allowed. I mean I suppose if you really tried, and wanted to with multiple accounts you could spoof the volume on Poloniex, but I give them props for taking the initiative and eliminating same account wash trading, I mean think about it, it means the exchange will loose money. An exchange makes money on volume in trades.. . so an exchange that is seeking to be honest, and not allowing volume being "faked" is an exchange to be emphasized, and respected.