Rating this is pretty hard, but I think maybe it's a 3.5?? I don't know. It was interesting, and it was pretty good (obviously) because it's Sanderson, but I was mostly confused. I got to meet a sleepless, finally (creepy), and learn a little more about Lift and the Skybreakers, but I missed Hoid (unless he was hiding around somewhere) and the book really doesn't stand on its own. Even if you've read the first two Stormlight Archive books, I think you need to be more immersed in cosmere lore (I took the route of randomly reading Words of Brandon and looking things up on Coppermind/17th Shard. And if you don't know what those are, you definitely won't understand Edgedancer).