Don't worry, I won't spoil you. And I don't have a problem with the ending of both of them, XIII-2 also has more than one ending (but only one true ending). If I wouldn't like the true ending, I can play any other ending as well, but when I saw the true ending and I heard that there's a sequel ("Lightning Returns: Final Fantasy XIII) there was no desire to play left. Don't like the gameplay of FF that much too, cause I like real time strategy more.
Before you ask, I started with FF XIII, I never played FF before ;)
Before you ask, I started with FF XIII, I never played FF before ;)