I liked this addition way more then "City of Bones" I actually did like the story and the plot. The fight scenes were ok. The fights with the demons and such I just wasn't as interested in because I had to reread those parts to figure out what was going on. Better than first one so a 3 for me. Still hate Jace and Clary although Jace was a little bit nicer in this book. 
 (view spoiler)[ So it starts out with Jace being Valentine's arrow and how Jace has to chose a side shadowhunter or pick Valentine's side. And then Jace is broody because who he thought was his parent isn't actually his parent. So that's what he is going through in this book. Clary has just found out that Jace is her brother and she wants life to return to normal but nope she's a shadowhunter. Then for some random reason she starts dating Simon. (I appreciate this Cassandra Clare I think you were trying to please both sides but I think I've heard too much about this series to even think that Simon and Clary is a possibility. I wish but no). Simon becoming a vampire that actually sounds cool, I like that Clare included him on the supernatural world. And I hope it gets explained why he can go out into the sunlight. I know in Vampire Diaries they have a ring that lets that happen and then in Twilight he just kind of glittered in the sunlight. I think Clare is improving so I'm going to still with the series for now. (hide spoiler)] 
 I don't really have a lot of problems with the plot like the story when finding out about backstories for Luke, Clary's mom, Valentine, and so forth my problem is that I don't really like Jace and Clary but the side characters really make up for it in my opinion.