The first 15 - 20 minutes seems like it's going to do the film justice, then it quickly derails into another run of the mill romantic comedy. If this did the illness justice, the movie would've had a lot less laughs, there likely would've been more violence and self-destruction, it would've shown the abuse that bi-polar patients can receive while under the "care" of the medical system, and in the end Pat probably would've killed himself.

But those don't make Hollywood movies, so let's just make it a romantic comedy with a happy ending.