Overall I did enjoy the book and if you like chick-lit I would recommend it as a pretty good read.
However, I had some issues with the book that combined with the lack of a real ending made it somewhat disappointing.
First of all, the book strayed far from the premise of Maggie being by her formerly-large-and-now-size-2 friend Olivia's side, and rather went on in an almost droning way about a crush she had on a guy that was turning in to something. One minute she was upset that it wasn't moving quickly enough, the next minute she wasn't sure if she could see him as a real man anyway.
Also regarding her life in general, you just don't rent even a studio apartment let alone a house (even a small one) in southern California making minimum wage. I know it's just a book, and fiction, but that is a really big part of her life -- being single and on her own and working at the coffee house instead of using her master's and the issues she had with that as she went thru a period of self discovery -- and it is not even humanly possible to live like that out there. Her parents were not helping her, either, as I told myself may be the case, and we find out toward the end.
Also, a maid of honor sits at the head table, not at a far-away table while someone else sits at the head table in her place. Period. I can't believe she would not confront her friend about the whole Table 9 thing. I understand that the slide show was supposed to be the "revenge", and that was clever, but by that point she should have not even showed up, because she wasn't the maid of honor, even though her friend might not have come out and said it. We never find out why her friend begged her up until the end to stay by her, yet chose to not have her sit at the head table. I thought by that point in the book she'd be smart enough, after having gone thru her self-discovery, to realize that no, she was not the maid of honor, and it was pretty obvious that Olivia had not been her "best friend" in a very long time. (They don't even live in the same city anymore, so what's the big loss, she had other friends and a great family.)
There is no proper ending! When I realized I had read the last actual page, I felt like I had hit a brick wall. There needed to be another chapter re: Table 9 and the aftermath, and a bit more wrapping up of the now-defunct (I guess??) friendship between Maggie and Olivia, as that was supposed to be the premise of the book in the first place.