I went in expecting to hate this book, figuring that it was one of those over-hyped, badly written flim-flams. It...wasn't? Not really? 

Fourth Wing sucked me in almost immediately, with a fascinating world (pretty standard fantasy world, but it's standard for a reason), funny/sweet characters, and a TON of tension, mystery, and sadness. There was a good storyline (I think? maybe it was all the lovely drama messing with my perception), all the action and death you could ask for, relationships formed quickly and shattered even faster. Love triangle, of course. 

But... (slight spoilers ahead) 
MAJOR sex scene warning. I think there were two, and a few kissing scenes...I skipped several pages because Who Needs To Read That? Young people should DEFINITELY not read this, and...be careful. Yep! 
Character development is probably the next biggest issue with the book. It's almost like the author set narrow lines for character behavior, and whenever she got bored with a person, rolled a die to see what they would *abruptly* turn into. It's just...meh. Good ideas for the characters, but not well carried out, fleshed out, developed. Like [stock loyal girl bestie] [stock joking classmate] [stock childhood best friend turned lover turned vengeful] [stock brooding older handsome guy who, we all know what must happen] and so on. 

Do you seek a superquick love story with dragons and war and betrayal, sprinkled with plenty of profanity and the odd sex scene? Here thou goest. 
Do you seek a quality book, something that will last, something with good characters, something that really has something important to say, something you'll remember for any reason EXCEPT the love triangle? Seek ye elsewhere! Flee! Get thee hence!