I'm not a complete beginner. Is this course still relevant for me?

Yes, absolutely. Although you might be covering some familiar territory in the early lessons, many people find it helpful to go over the basics more than once. The main advantage of this course is that you will be listening and reading to the story that accompanies the course from the beginning, which you will be able to enjoy even more with your existing knowledge. The speaking lessons will also enable you to consolidate the German you already know, which all contributes to building a strong foundation and making fast progress in the language.