Rapture is OK.
Fast-paced, very short and an easy read, so you can get through it in some hours, I guess that's a good point for a simplistic story like this.
It lacks a lot, though, it's definitely not something I'll remember for long. Especially the cliche ending; the last chapters' fights and twists are downright silly.
As I said, it's ok. It didn't really leave a deep impression on me overall, neither bad nor good. I can recommend it for those who want to turn their brains off for some hours for a quick and pleasant read, with a heavily eyeroll-stimulating ending. Just don't expect much.