The start of this book was good, it definitely had the crack in it the other two books in this series had and was really compelling. 
 
However, unfortunately it dragged towards the middle when everyone was on their 'team quests', it felt repetitive and there wasn’t enough character work to bulk out the quest plotlines. 
 
And unfortunately, it kind of just got worse from there. Don't get me wrong, this was never awful, but I feel like it pales in comparison to the other two Crescent City books:
 - In the last battle characters over-explain plot points and motivations A LOT, often in an unnatural way that disrupts their usual speaking pattern/personality and really sticks out. It feels pretty juvenile, as if Maas doesn't trust us to understand the plot, or like she can't write that kind of thing naturally. 
 - The interweaving storylines towards the end felt disjointed at points, the timing felt really off between sections.
 -

Also no-one died??? Not one single main or even side character?? Pretty weak ending, I need at least one true sob. I'm sick of characters 'dying' then against all the odds being brought back to life. Not for one second did I think Bryce was going to actually stay dead.

 -

Tharion's PoV didn't wrap up AT ALL. It wasn't even an interesting cliff hanger. It was like Maas forgot to give him an ending...

 
Other issues I had:
 
 1.

I was disappointed there wasn't more time in Prythian and that we only really got to see Nesta and Azriel, not the full cast. The end of House of Sky and Breath did start to feel like a cheap cliff hanger trick...

 2. I felt like the twists weren't anywhere near as shocking as in previous books, and I saw many of them coming especially towards the end. I don't think I was properly shocked even once. 
 3.

They won EVERYTHING way too easily, where was the tension??

 4. The sex scenes felt really out of place and jarring in this one, way more than they had in the previous books. Maybe it was because this one is a lot more plot focused than character/romance focused? It honestly felt like a fantasy with two or three graphic sex scenes, which is not how the rest of the series has been. 
 
Overall, not a terrible book, but it really didn't stand up to the quality of the first two. The start was really strong and I was really hoping for greatness, but the ending just was not it.