More like a 2.5, the second story really saved this book in that I mean it made me not think it was 100% worthless. So here's a better breakdown of my feelings: 
 First story was pretty much not important. Was it interesting? Sure, but from what I hear it doesn't offer anything useful to Glass Sword and that makes me feel like it would have served better as bonus material in the back of Glass Sword or Red Queen. 
 The Second story was much more relevant and included some information that's nice and interesting and seems relevant though I also feel like the information that you gain that's essential could have easily been gathered in Glass Sword once Mer wants her answers. So even though I enjoyed that story more, I still feel like it's unnecessary. This novella bind up just seems like an attempt to make more money off of the success of Red Queen which is totally fine, but not worth my time nor many other people's. 
 I say borrow from a friend or the library.