Hi Andrew
I am currently working my way through their CAD course and my impressions are overall very positive.
They way the lessons are presented is quite wordy - it can take me a while to understand what it is I am supposed to be doing, but after initially finding this quite frustrating, I now like the way it is done, as I have to think about what it is I am trying to achieve, rather than just follow a step by step guide like a lot of lessons.
I find I often have heaps of questions, or need more explanation of a topic, in which case, a quick email to their instructor, Nathan, results in a very quick and helpful response. The feed back on submitted tests is also quick and helpful, with lots of usefull additional tips that I might not have thought about.
I have currently reached lesson 5 of 10 and all the lessons so far have covered the modelling and fairing of different hull types, blending in different keels etc as well as calculating some basic hydrostatics.
The remaining lessons look to be covering things such as adding cabins/ deckhouses and masts, as well as producing "good looking" 2d drawings from the models, construction details and further stability calculations.
Overall, the content seems to be quite comprehensive, and the help and feedback via email has been very useful.
Hope this helps.
Cheers
Chris