I really enjoyed the storyline, but the ending in regards to the 'father project' was a little far fetched - I don't believe that a medical student would make such an error in regards to genetics/biological parenting. I did see the eventual outcome about a third of the way through the book but this didn't bother me as i found the two main characters and their odd relationship fascinating. It also helped that both of the main characters (Don and Rosie), whilst both weird in their own ways, had lovable and cute traits that as a reader drew you into the book and made you feel a certain kinship with them.

I will end in saying though, the entire time that i was reading this, I constantly pictured Don in my mind as Sheldon from The Big Bang Theory - could budge the image no matter how hard I tried!