I was tempted to give this a 10, because it does what it does very well, and ... I loved it. I'm giving it a 9, mainly because it's not just about me, and (judging from the other reviews it's gotten) it takes a certain kind of person--and definitely a certain mood--to appreciate what this movie has to offer. On a different night, I wouldn't have had the patience to sit through it, and that's partly because I can't slow myself down often enough, but it's also partly because the movie doesn't do quite as much as it could to draw the viewer in. You need to be in a relaxed, introspective state of mind, I think, but if/when you are, you might find this as rewarding as I did.
I don't want to say a whole lot about the plot, the characters, or the issues that they try to deal with. Part of what I like most about this movie is the way it reveals these things, so I think it's best to not know many details going in. But I will say that there seem to be some important lessons about life and relationships that could be taken away from this, and the messages come across in a natural, unforced way. This is pretty rare.
Reviewers have pointed out that Bosworth does a fine job here, and I completely agree, but the rest of the cast also deserves plenty of praise. Most of what's going on in this movie is pretty subtle, and lesser actors/actresses would have tried to overdo things--and a lesser director would've let them. Even minor missteps in acting or directing can be quite a turn-off for me, but I don't recall any such thing in this case. The locations and camera work didn't hurt either. I was immersed from start to finish.
I also loved the dialogue. Here, too, what I appreciated was that it wasn't overdone, nor was it too subtle. The people on screen talked pretty much like you'd expect them to. (I never found myself thinking, "That character would never put things that way.") Nothing seemed artificial.
So, I guess I could sum things up by saying this is a patient, enjoyable, and flawlessly executed study of certain issues many of us are going to run up against at some point in our lives. I honestly think that many reviewers just don't get it.