Perhaps more like 2.5, since I did enjoy how the novel started. The main character started to irritate me, though, because she was always SO decisive about her wishy-washiness, if that even makes sense. That is, she would declare her firm belief/desire in something, then the next chapter be just as firm and declarative about how she's changed her mind. And her opinions change so much! She's always discovering things, and you'd think that would be transformative; instead, I was irritated at how her opinions and worldview seemed to keep see-sawing. 
 The novel really weakened by the end, though, when it started trying to explain more about how the super powers worked and the experiments going on. I was confused by the explanations, and the bizarre logical leaps the main character seemed to be making. The villain was ho-hum Bwahaha megalo nuts. Everyone suddenly became beyond superpowered, with powers piled upon powers. When the two main characters finally flew off into the sky as a result of......a convenient transfer of powers enabled by their true love....I breathed a sigh of relief. =/ 
 I really liked the concept; just have a lot of regrets about the execution.