I bought this a year ago and only just started playing it a few days ago; it's a bit embarrassing because I only started playing it to get unlocks for the mobile version (which has strangely captured my attention).
I was blown away by the story mode; I remember hearing all about how great the MK9 story mode was and just wrote it off as "good for a fighting game" but not really "good"; if it was anything like this, I was so wrong; I really liked the story in this.
I think the graphics already look a bit dated when compared to the sort of games that have been coming out since the new consoles released, there are a lot of unlockable costumes it seems.
I really didn't like how the game controlled though, I think it was mostly the 360 game pad, but there were moves that I straight up couldn't pull off in the training mode.
Seeing how you can easily find this for $5-10 now, I think this game is a must buy for the story mode alone, but I think the story mode is really the only reason to play this game.