I actually disagree with Belle that all courses and books on craft are a waste of money. If you want to be a painter or sculptor, you often go to art school, so why should writing be any different? You still have to learn your craft. The vast majority of writers can improve, and as Belle rightly pointed out in another thread, it's actually very difficult for the average wannabe to access high quality, worthwhile feedback/critique. Most forums, for example, are just Wannabe's advising/critiquing other Wannabe's. Some books and courses can really help you to assess your own work better and eliminate fairly basic problems that will render your manuscript unpublishable.
Personally, I have found a number of books to be valuable - The First Five Pages, Thanks, but this isn't for Us and How Fiction Works, amongst others.
However, I can't comment on the quality of the specific course you're looking at, and I know there are a lot of crap ones out there.