Even though I dropped it, this is a good manga I wish I didn't have to drop it. The concept is ABSOLUTELY interesting, it has at nice to good characters, poses interesting questions about society, even though it doesn't go super deep into it.
That been said.... it lost itself and couldn't wrap up in a nice way. Too bad, the mistery it built up was really interesting and a foundation for the manga. With the amount of dram it built up, though, I just can't bear to read any longer...
If you are starting now, though... do read up until you can stand it. The idea is really interesting, as I've said.