But if you want the platinum (or unlock all achievements), and ... hang on. For platinum FF13 (in just under 300h) I can easily affirmed that the significantly harder and requires a lot more time than the latter. This is a traditional oriental game: There are things to do around and get there in one piece raise the miracle (though with a guide).
Indeed besides various personal purposes (some of which are extremely hard to have), do all the quests looks epic. Indeed as some objects if you do not make a specific point in the game, it's over you're good to start over. Of course we can say that this is normal in an RPG like this. Yes its becomes very complex very quickly =).
Otherwise there are difficulty levels for everyone, whether for beginners or confirmed players. I sadly regret some problems with the not always very judicious camera (but the gene does in no way the game ^^) and sometimes disconcerting stupidity of the AI ... whether for your allies (which do not attack) that for your enemies (who weathervane).
What do I think this game is a little lower than the master in the art that are the "Tales of ...", but is a living experience for all fans of challenges and RPG ^^