It's a good lecture, but it's a bit unkind. From the beginning and the materials could have been more detailed. They do explain the important parts, but there are quite a few explanations that get skipped, so you have to compare with the GitHub code directly to figure things out, which requires unnecessarily much attention during the lecture. If you've learned Spring, it's not a big problem, but I'm giving it 4 points because of the time wasted.