I sat down once after work (And before class) and again after class to play som FFXIII on the PS3 last night. I played for a total of about 1h40m . So far I am really enjoying the game. There are definite pluses and minuses that I see at this point:
Pros:
-Extremely beautiful graphics (during both cutscens and battles)
-The evironment is very detailed so far
-EXCELLENT sound, including surround sound and LFE effects, mabye some of the best in a video game.
-the transition from roaming to battles happens very quick. This is a huge plus for me because I can't stand RPG's that tend to hang, slow down, or go into excessive loading screens for every battle encounter. (thinking of lost odyssey here)
-The pace is very fast which is good.
-Excellent character development and interaction so far.
Cons:
-linear so far, and based on reviews I have another 20 hours of this

-only being able to control 1 character in battle is a bit different for me in a jRPG... maybe a con but maybe not as I am really starting to like the fast paced flow of the battles.
-Right now the battle system consists of just pushing x a lot. I think that the battle system will really develop into something interesting and challenging though.
-A heal potion heals the entire party??? Come on- I've never heard of an RPG where you didn't have to select who to heal in battle (unless you have a heal-all spell or something)
I'm anxious to play more and see how things unravel.