This is chick-lit at its finest: a light, quick read with a fun, somewhat implausible plot, and a happy ending all tied up neatly. There are some potentially serious subject matters thrown in to balance out the plot, such as rape and a brain-damaged sibling, but they are treated so lightly that it's difficult to take them too seriously. But this kind of literature doesn't claim to have social philosophical relevance. So read it for the escapism; Jennifer Weiner is a master at this kind of story-telling.
I borrowed this book from a friend, so can't offer it up for grabs; sorry!