I'm not disappointed with the ending of this series. That said, it doesn't stop me from wanting more out of it. I understand there are plans for more co-written books, and so it's left open-ended for that purpose. Despite that fact, I had hoped it would have felt like more of a true conclusion to the story. 

I also found a few of the plot points to be a bit ridiculous. I still enjoyed it, but I couldn't help but roll my eyes a few times. 

Overall, I would say this was a good read. I particularly liked reading this series to see into a new Sanderson world outside the Cosmere. His world building is wildly imaginative. Fun. 

I'd recommend this to YA fans and Sanderson die hards.