I have just started the '28 Day Grasshopper Challenge' this month and wanted to share some words related with it. From the very first day, I realized this was no ordinary task.
Ertunç asks you to create a geometry/model, but he makes you aware of the steps you take while creating this model. He also helps you create the model by giving you the necessary instructions in advance, but he doesn't overwhelm you with strict sets of instructions.
What makes the course unique is that you don't use Grasshopper at first to create these models. You build your idea with pencil, paper, and scissors according to your own rules. I like this!