Instruct: Classify Amazon reviews into positive or negative sentiment
Query: interesting premise...but predictable and unrealistic

The novel had an intriguing premise- one sister being created solely to keep another sister alive. It was also written in a clever style- each chapter through a different character's perspective. However- both the completely predictable romance and the completely unrealistic/ridiculous ending had me frustrated that I spent time reading this novel. I had high hopes for the interesting subject, and was very disappointed!