I took that course. It does show you a lot but takes a long time to complete if your busy, and like someone else said, you really have no instructor to spend any time with you. You can email them but it's not the same. And the price is a bit high. If cost is not an issue to you then I would say it is worth it. I learned a lot of things from it for what I needed.
It does give good teaching on drawing by hand if that is what you intend to do. Also came with pens and tools to get you started.