Go for it, its pretty cheap and its the last time you'll be able to play as alot of these characters until the next Trilogy or Armageddon style game which is years off because we havnt seen or heard much about MK9.

I play it on the 360 and is still able to get some matches too, not sure about PSN but its not packed. On some days it'll be empty online.

Also some will say Deception is better but with the fighting styles cut down to 2 per fighter and the adition or air combat this game feels better than Deception when playing but thats me. Plus all the ninjas look unique for the first time and actually feel like different characters instead of palete swaps.