Not sure if this should get 3 or 4 stars. I'll err on the generous side...
For the most part, I enjoyed this. It's a light and funny novel, but due to the OCD given to the protagonist, it has its dark moments.
I can totally sympathize with people who have OCD since I have a few compulsive behaviors myself. Reading this book, I really felt as though I could get into the main character's head, and felt what she felt. At times, though, her character didn't seem to ring true; she was just a little too clever and ready with the one-liners, I thought. Her "recovery," also, felt slightly off to me. Slight spoiler:
Just going by my own experiences, having her routine distrupted (even by someone she loves - actually, more likely by someone she loves, because she can express herself more fully) ought to have made Grace more anxious and more likely to fall into her old stress-relieving patterns, not less likely.
This was a good book, a light one, good for an airplane or a vacation. I doubt it will stick with me, though.