1.5 stars, mostly because I feel cheated. This book got some great reviews I adore but after reading it for myself, I feel like I invested in a book that just wasn't worth it. 
 The premise is interesting enough. DUFF = Designated Ugly Fat Friend. But Bianca, our protangist, is hardly someone I'd call a DUFF. If I'm not wrong, the only 'physical shortcomings' she has are big thighs and small boobs. I'm sorry, but as a person who is currently overweight myself, that hardly seems enough to constitute her as a DUFF. 
 Which brings me to my next point, Wesley Rush, the 'evil guy' of the novel. The man-whore who gives Bianca this rude nickname in the first place. Bianca is clearly upset with this nickname and she makes sure to tell us EVERY SINGLE TIME she is upset with this use. She promises herself that she's too cynical to bother about this nickname and YET, she thinks about being called the DUFF all the time. 
 Bianca is described as loyal and cynical. To me, she wasn't cynical, she was just annoying. For some reason, she was just an unlikeable character for me. Characters were not fleshed-out enough and everything read really unpolished, like fanfiction, only it's the original fiction version. The ending was predictable, which of course, did nothing to alleviate my disappointment. 
 The language as well as the sex scenes (yes, there's sex in this one) might offend some. Considering Bianca starts a relationship with Wesley so as to distract herself from her own family problems, I'm not surprised by the sex content but it might get a little too graphic for teenagers. That and it isn't exactly the best message to send out to 16-year-olds: have sex to distract yourself from your problems. 
 Kody Keplinger is after all, a young writer so perhaps this book is forgivable. Let us hope her second novel is an improvement from The DUFF.