The class works really well as a companion to the book. It’s a fairly short class, comparatively speaking, and she takes you through designing a sweater step by step. There is lots of information here that’s also in her book, but the book is so technical that it’s easier to understand coming from her.
Her background is in custom knitting for clients, and that’s clearly the point of view at work here. She goes over calculating decreases certainly, but there’s one point where she recommends gradually changing needles sizes in order to create waist shaping in a pullover with a large lace motif. This will undoubtably work and it’s a great solution for a one-off, but in my opinion isn’t necessarily the right call when designing for patterns. It’s hard enough to get people to match one gauge – matching four? That’s a high bar to clear.
She has a pretty great way of explaining all of the calculations though, and it’s much more visual than in Faina Goberstein’s Craftsy class Sizing Knitwear Patterns. In fact, I’d say that this is a huge benefit of the class. Sweater design is a hugely mathematical endeavor, and if you struggle with how technical most of the resources out there are – including Knitwear Design Workshop – this class would be a great place to start. There is lots more detail out there to find, but this is a thorough and excellent beginning.