I started with the Beste Freunde and continued with the entire Mit uns series. I am quite satisfied. The negative aspect is that the grammar is not concentrated and developed enough, so an additional grammar book is needed. However, it is structured in a way that does not require extensive reading, and one can handle it perfectly with just the lesson and reading the words. The topics and exercises are quite interesting. It meets Goethe's requirements to the fullest, as it also highlights the types of exercises one will encounter in the exams. The result was achieving the B2 level of the Goethe exam on the first attempt