I've played it like, twice at the arcades. Quite expensive at Liverpool (in Sydney).
It's like, $2 a game. Play til you lose. But the AI gets tough real quick. You gotta be one of those Tekken freaks that hang around Zaibatsu forums to get a decent streak.
There's this new rage mode thing. If you are low on health, the damage you deal is greater.
Also, my favourite character so far is Dragunov. Kinda sucks cos a few of his moves that a frequently use got nerfed in 6, but he's still badass.