The Sims Life Stories doesn't add much to The Sims 2, although, it's a entirely improved game, making it worthwhile.
The graphics are only slightly improved from The Sims 2, and sticks to the same formula has the previous games. The camera is easier to control now, and unlike the PC versions of The Sims, this is the only PC version that has a proper story.
The story though doesn't seem to actually suit The Sims, making this game feel like a worthless installment. Anyone who might like playing The Sims normally, won't enjoy this.
Overall, anyone who is looking for a Sims story driven game, should get this. Otherwise, this isn't your sort of game.