After over three months of playing this game on and off, I am very happy to say that I have finally beat FF XIII! Although I thought that the final dungeon was poorly designed and a pain to get through for the most part, I actually really enjoyed the final encounters and the ending cut scenes (minus My Hands, whoever decided to put that in the game should be fired).
Overall, the game was an enjoyable disappointment. The story never accomplished anything special, despite some emotional scenes. The writing was mediocre at best, and the overall direction of the game was a mess. My favorite aspects of the game were its battle system (great new take on ATB), beautiful visuals and some really great music. However, for a game that was in development for as long as it was, it really should have been better. If you don't like the battles in this game, then there is really nothing that FF XIII can offer you, since it is essentially the entire game. To that point, I feel like the strategic battles are often what draws people to these games anyway.
If they make a XIII-2, I would definitely be interested.