Don't hate on the GUI...there are tons of awesome people there, and a HUGE potential to profit big time due to the smaller amount of volume.  Sometimes people wanna buy a coin right then and there, and the buy/sell orders are sometimes behind the rest of the exchanges - what I'm trying to say is awesome arbitrage (they even have a page for that)

Cryptopia is always adding new features - their devs are quite possibly the hardest working out of all the exchanges to date.