I loved this movie and think it is wonderful. There were some issues I had with the overall story though such as since neither "person" can remember what the other one did, there doesn't seem to be much incentive to actually carry on doing it. I mean, if Demi Moore's character actually had fun as the younger version of herself that would make sense but since neither of them have any recollection of ANYTHING that the other one does, we have to ask what is the point of doing it at all?
I tend to over analyze plots but to me this is a rather massive hole in the story's plot armor.
I felt the same way. It entirely contradicted the "You are One" message.