Yeah, definitely. I grabbed it on PS3 for the free multiplayer and the inclusion of Kratos. I was surprised that the 360 didn't have anysort of equivalent extra character, which sort of makes the PS3 version the one to get.
I don't think the story mode is super long, but it's a pretty good chunk of game. I just got an achievement saying something about 50% last night, so I think I hit the halfway point and then got somewhat beyond that, and I'd probably sunk 3 hours of game time into it by then. It's getting harder as it goes, too, so I'm losing a lot more, which makes it hard to gauge just how much is left. However, I've just hit a wall in trying to fight Shao Kahn. Dunno' if he's the actual last fight, though I suspect not, but fuck me is he hard. I did manage to beat arcade mode on Beginner (yes, I suck... and bear in mind that I really only got to fiddle around with the MK games prior to this, I never owned one or took the early games any more seriously than I would any other amusements back in the day), but holy fuck! In story mode it's just insane! I have it on the default difficulty of medium and I've done well enough so far that I don't want to change it, but dude can take *over* half your health with his x-ray, using *your* x-ray on him takes maybe 1/13th of his health, and he's got that magical boss bullshit where sometimes when you punch him he just glows and while taking the damage, won't get interrupted or knocked down. After about a half hour of the abuse, I just had to quit. Either I'm missing something or I just suck too much to take him down.
Gonna' probably go spend some of those 8 bajillion unlock points I've acquired, then do some more challenges at the tower before I try to take him on again. And hopefully not stay up until 3:30 in the morning playing this again...