Ok so for starters, I find this book series amazing! I absolutely love the characters, and the writing is beautifully executed. However, going off of a few other reviews I've seen, this book series is obviously meant for people who enjoy more erotic romance. If that makes you uncomfortable this isn't the series for you.
But, with that being said I did only give it 4 stars for a reason. Even though the plot is interesting and most of the characters are well fleshed out, the ending is what I'd describe as lacking. The way book three ended tied up the main plot line, being the end of the war, but many other smaller sub plots were left hanging in the wind. Now I'm a fan of the ending being left open for interpretation, but that doesn't seem like something the author was going for. I'm aware of the two books that follow. I've read the court of frost and starlight so I can say for a fact that some of those major loose ends don't get fixed. But I can't say that they won't considering I having finished the last book about nesta and cassian.
Overall great story but the ending could have been been better!