It's really the best. While taking other lectures, I had questions like "Why is it used like this?" and "Why is this part like this?" while studying on my own. Everything is clearly explained. While studying on my own, I spent a lot of time trying to find answers to questions like "What is a class?" and "When do you use a constructor?"... I was able to get clear answers to those questions. I recommend you to go through the introduction and move on. If you have ever studied Java and object-oriented programming on your own and had questions that you couldn't clearly resolve, I highly recommend it. I'm really looking forward to the intermediate and advanced lectures. I hope I can take them soon.