Creating web applications using Rails truly makes you experience a whole new world. The concept of handling both frontend and backend together without complex processes is really innovative. The lecture was also very kind and detailed, so I progressed without any obstacles. However, while this is a beginner's course, since you're a developer with 20 years of experience, I think you might not have a good sense of what beginners don't know. For example, you barely explain Docker and just skip over it, and you also lightly pass over Git, but honestly, real beginners don't even know what those are. They don't know why they're doing it either. That part is a bit disappointing, but other than that, it's a very comprehensive lecture. That's why I'm giving it 4 stars.