There are so many 5 star reviews (mind blowing) that I just had to write to say, this is definitely NOT a 5 star movie.
Overall it was very rote, predictable and pretty boring. The only part that made my laugh was Isla Fisher's dancing with Hugh Dancy; it seemed like the only authentic moment in the movie, and was actually edited to be funny, (whereas the editing in other parts of the movie didn't help the humor).
Hugh Dancy was good, Kristin Thomas was good, and a few of the featured actors (like the receptionist at the publishing company) were good, but most of the acting was over the top, hyper and therefore dull. The character and story of Alicia (Leslie Bibb) was under formed and not brought full circle to the point where I wondered why they had her in the movie at all.
Overall, it was light, mindless entertainment, but I'd never recommend anyone spend their time watching this.