Looking through other reviews, I see a lot of people unhappy with the ending, but I think they fail to see the whole point of Sam's repeated day.
It's not about her having to solve something that would lead to a different outcome, because she was supposed to die anyway.
It's really about her getting a chance to leave the people she loves with good memories and tie up some loose ends before she dies. If you think of it, it's really a gift, not a punishment. She gets to tell her family and friends she loves them, implant beautiful last memories, save a girl's life (not by offering her own instead, because she was supposed to die either way) and leave the boy who always loved her with the knowledge that she loved him back. How many people get that chance?
If she hadn't gotten her repeat day, she would have left lousy or meaningless memories of herself to everyone. In the end, she understands this and no longer tries to find a way to get out of the loop.
So I get that a movie like this can leave you angry about the ending, but actually it couldn't have ended better.
Oh, and I don't think it's a movie only meant for teenagers (except for the soundtrack, of course).
Review of Before I Fall
