Only bad thing about this game: Load times.
If you haven't played Tekken before, this is a good entry to the series. With no less than 40 characters, you'll spend a lot of time mastering them all.
The new Scenario Mode is awesome. Some people like it, some people don't. I personally think it's genius. The huge customization gives it a small RPG feel to it, which is always welcome.
The best thing about each new installment is the fact that we get new characters - the new characters are awesome. My favorite's Lars. Very good designs, makes you want to play the game even more.
The graphics are awesome, way better than Tekken 5 (Dark Resurrection). Great effects, great style, great everything - just be sure to play it in HD!
The only drawback about this game is the loading. It's everywhere and it's long. I'm hoping for an update to fix this, since it's my only complain about the game. No biggie though, it's as awesome game, go pick it up if you feel like playing a new fighter!