I really did like this book, there’s not much of a plot, but it’s just a short story about how everyone is doing after the war & the events in the first 3 books. I liked being able to see how everyone is doing after their HEA, but you could still see how much they were all struggling with the war & everything that happened. 
I would still recommend it even though it doesn’t necessarily add much to the the series as a whole; it was a fun little read.