I think it's a pretty cool game, but it does get damned expensive

I have not played it myself as I don't even have a chance to get near the machines... I saw at Bugis where they have $1 continues, the people there have about $50 in coins and they keep feeding the machines.
I think the game is bloody successful like this.. as for its longevity, who knows?
Personally, I prefer a good beat-em-up

looking forward to PS2's version of Soul Calibre II where they will feature Heihachi Mishima from the Tekken Series