Final Fantasy 13 Leveling system

The FF13 lv. system is very unique. Like I said before, the game is incredibly linear, and so is the leveling.
It is similar to the leveling in Final Fantasy 10, except for a few changes.
1. Instead of spheres that level you up, you level up solely on CP (AP to those who have played other Final Fantasies)
2. The amount you can level depends on where you are in the game. There are 13 chapters, and almost every one gives you a "Crystarium Expansion"(Crystarium is the grid that you level up on).
3. There are one or two places to grind, and they are at the 3rd disc. This game will not allow you to develop past a certain point. When you beat an important boss, your Crystarium will expand, thus allowing you to level up more.