To be frankly honest it's nice they're on there, but nobody plays. 98UM gets the most play IMO and that's sparse. I'm waiting for '02UM to get updated because we might get a decent amount going on that one.
I have this on the XBox360 and somehow I never really got the hang of this one - I don't know why. I was very eager to get it but while I enjoyed my time with KofXIII I never seemed to get into the groove of the game there.