The ending to the Throne of Glass series was a good book but didn't hit all the marks. 
Pros
Many POVs really built the suspense and action 

I did appreciate that Aelin for once stopped being all powerful. I hated that with every book she got more and more ultra powerful

ACOTAR Easter Egg was cute!
Yrene is everything 

I ate up every couple who were angry at each other but after living through war fell into each other's arms

Cons
As is a common complaint with a Maas book, there are many near end twists which seem to miraculously save our heroes.

Aelin bringing out yet another secret army after secret army was just one step too far

Additionally, I didn't feel like the stakes were adequately balanced. The only key losses were

Gavriel and The Thirteen

. These were devastating however I felt like they were tokenistic sub characters to lose.