hey too
I've traded there to buy and sell some kinds of coins (alt coin)
and i like their trading platform, fast confirmed and cool site
never have any problem before, so i never try to contact their customer support
about volume, if you talk about trade BTC to fiat, they have lo volume compared to another chinese exchange (especially who has "margin trade" feature)
but if you talk about trade BTC to altcoins, bter has good volume (because their volume = BTC/fiat trade + BTC/altcoin trade)
http://exchangewar.info/