I purchased the course hoping for detailed explanations, but that's not the case. The instructor seems to suffer quite severely from the curse of knowledge. I haven't listened to all the lectures yet, but most of the content in every lecture ends with something like "if you do this like this, it becomes like this." There are no detailed explanations of why you need to write it that way, what this is, or what that is. While listening to the lectures, I often find myself googling things, wondering "what does that mean?" or "what is that?" I've already purchased it and refunds are not possible, so I think I'll just get a basic understanding of what nest and next are here and then either purchase another instructor's course or study separately through googling.