If people can afford it and would like to reap the benefits from more games using the harddrive to load stuff, this is absolutely a problem solver for this games horrible framerate... Only problem it's not cheap, and buying a game at around $60-70 is usually the cost that you want to pay up, and not an additional 150 or so bucks.
Sorry if this has been posted before, just thought some might be interested to know if they didn't already.
PS. My charater is currently lvl 45, has a save file of around 13mb with around 70 hours of playtime. Mind ya'll, before I installed my SSD the game was lagging like a ************.... Also, if anyone does decide to get a SSD installed, beware to synch all trophies as they will be lost otherwise.

Now I have a 115gig corsair which isn't a whole lot more of course, but really I don't need to install every game on my console... Of course if you already spent money on getting a bigger HDD getting a new smaller one feels like crap, for sure. But other games also benefit from change of drive, especially GT5 which gets halved load times 