I took the full drysuit course because when I did my Advanced course out in Saskatchewan, we did not do a drysuit dive, they were all done in wetsuits. So, after 73 dives in my wetsuit, I finally decided to purchase a drysuit (read: the winter months came along....). Due to my lack of drysuit knowledge previously, thought it woudl be a good idea to do the course, it wasn't that much more. Although, afterwards I feel that I probably could've learnt it all just by trying and diving and talking to people, I'm still glad I took the course, cause it just made me learn all that much faster and concentrate more on attaining better buoyancy and trim than just how to work the drysuit.