I have only started to scratch the surface of this, but I love what I'm seeing so far. I've been a workbook nerd since I was little, and finding one for Swedish is fairly difficult in comparison to other languages, barring grammar and text books with the usual exercises. I enjoy reading grammar books and practicing with reading and listening to Swedish websites, news, etc., but it helps to have a bit more structure in the form of a workbook, to bridge the line between the base knowledge of grammar and vocabulary, and the application of that knowledge.
In short, while I enjoy all of my varied resources for self-learning Swedish, it is helpful to have a substantial workbook to add to my list, especially for anyone who also loves grammar/language exercises for practice and a strange idea of fun like me.