Finally finished it at 36 hours. Game was pretty much endless tunnel grinding for the 1st 20 hours. Finally the overworld, which was brief, then back to tunnels. At this point I just started skipping monster battles. Then that tower level that FINALLY was not a tunnel. But it was short. Then some brief section in some abandoned town, then back to caccoon and more just running through with monster battles. Got owned by some monsters I didn't quite evade, lots of retrying and evading, long hour+ boss fights with 3 medics. Skipped all the monsters in Orphan's cradle (they always killed me), killed bosses, yadda yadda finished game.
So:
Game was pretty short.
Most of it (ok, nearly all of it) is just hours and hours of running through tunnels killing monsters.
No towns, pulse is devoid of any civilization. The field was just a field with monsters.
Sidequests seem like pointless hunting/fetch/grind quests. Meh.
Story wasn't very interesting, was like a cartoon story. I still hate all the characters.
Background mythology and fluff was very nice and detailed, but very poorly presented in the beginning.
Fuck high HP bosses that take forever to kill, and then towards the end, after you chip away maybe 75% of their HP, they pull some BS (doom your main character) and you lose, having to retry again. Repeatedly.
Combat is overly simple.
Some good music, mostly meh though.
Did I mention GRINDING? And TUNNELS?
That is about it for my masochistic adventures in FF13. I like the other FFs I have completed better (4, 6, 7, 9) except FF12.