Tekken 6 is okay gameplay wise. Unfortunately it fails everywhere else.
Scenario Mode is a frustrating piece of crap with a horrible camera and a boring story. If you have a SDTV, like most of the world does, the text is microscopic and very difficult to read from far way. Most of the ending Stories are stupid and non-canon. Unlike Tekken 5/DR's awesome continuous ranking up gauntlet, Arcade mode has been reduced to a very brief and extremely disappointing 5 or so matches. Also it takes 3 wins to level up online when it should only take one. Oh and even if you install it (on PS3) it still takes too long to navigate from place to place.