This is my second book by Sophie Kinsella and I like it too. I can see some kind of pattern or rather I can feel her writing style. I like it. This piece wasn't so hilarious as Can You Keep a Secret? but still it was funny, entertaining and had a bit study of our times. 
 I think it ('Can You Keep a Secret?' also) is a really good example how to try to say something more important to young girls who read nice romances. I am not sure how many readers see more than a witty novel. I am not sure also how much of this wisdom I see is my interpretation, how much Sophie Kinsella wrote it consciously. Nonetheless for me there is a hidden level in these too books. 
 By the way, some sentences were brilliant. How many times have you did or said something and then thought something like: 
 I need to backtrack. I need to reboot. Do not save changes ;-) 
 And again (like in 'Can You Keep a Secret?'), there were a bit unrealistic small aspects but I didn't mind.