I've taken a total of three courses through Ecole Chocolat (two on-line, one on-site) and overall had a good experience with them. In the on-line courses students are provided with a great deal of information/reading materials and asked to complete assignments based on these materials. Before taking my first course I tried to do quite a bit of research and practice on my own, but I think the additional resources they provided and the more structured format of the course allowed me to progress further and more quickly than I could have on my own.
Hope that helps!
We did this course and its was pretty helpful. Most of the learning material is given to you and its up to you to practice as much. Sometimes you get overwhelmed with amount of information that's out there. If you don't have much knowledge of chocolates then this course will be helpful as its nicely organized. But like i said you will need to refer to other material, books, you tube videos, and practice if you want to be come a start a business. We finished this course few months ago, and now its all about trying new recipes and expereiments.