This movie is not for everyone. It is being billed as an "intelligent comedy" and I would not call it that. It is more of an intelligent drama with dark comedic overtones. If you are looking for a ha-ha funny comedy, don't get this movie, as it is not light-hearted, either, as the name implies. However, for the right viewer, I would have to say that it really is a great movie, it is absolutely new, and I found it wonderful, too.
The movie is ostensibly about five New Yorkers and the details of their lives a year after 9/11. These characters were not involved in the 9/11 tragedy directly, but it shows how the stress of just living in the city where this tragedy happened has affected each of their lives and the conclusions about their lives they've arrived at by the end of the movie. The five stories interweave but can be watched separately in the special features section. I highly recommend watching them together, though, because there are parallel elements between the stories, even though at first they are not obvious. In general, I see this film as being about the stress of living our lives today, and the choices we make about our problems.
Now, here's why I think this movie is not getting rave reviews---when I watched it the first time I thought "This is just dumb"...in other words, I didn't get it at all---but since then, I've never had a movie haunt me so much. The more I think about it the more meaning I find in it. Have you ever watched a movie like that? I usually either love them or feel like I've wasted my time. So this movie is definitely different. It is subtle and profound, and has to "sink in". If you have someone to watch movies with who enjoys discussing them afterwards (and your friend is pretty intelligent and introspective), then the experience will be even better. I cannot stop thinking about it, which is a new experience for me.
The acting is fantastic, and includes a cast of respected actors (see the description of their past roles above).
I rented it first, and then bought it, which I would recommend. If you are the right viewer, watching this movie will be a new experience for you, one that will make you think about life in general, and one you will never forget. You'll want to watch all the special features, and the movie over and over again.