2.5 stars 
 What I really like about this book is its heroine, Harriet Manners! I think she's fresh, cute and has a touch of naivety that suits her well. 
 But the rest of the book? Well I absolutely don't mind unbelievable plots with teens. When I'm reading a book about "a geek" that has been promoted to darling supermodel extraordinaire, I know what I'm getting into and usually love it (I blame all those Disney tv-movies really) but somehow, I want them to embrace it to their fullest potential and in the Geek Girl series, welll, I don't think it's done and too many cliches are set for me to really enjoy it. 
 I'd say Model Misfit is a fun book. The strongest point is Harriet and her family and friends. I'd just remove everything about the boy. I don't think that removing him from the story would hurt at all. After all we barely saw him (but Harriet talked a lot about him ;/ and his presence was not really necessary. 
 I'm sure Harriet could have fun adventures either way!