Not bad, but further work is required

But what we definitely miss is a written from the outset included the purchase version. There are a lot of vocabulary, where you can not close it by pure listening, as the word is written. This leads to significant misunderstandings. The learner receives only partial information about such misinterpretations or deviations. By contrast, often simple words are repeated too often, what is unnecessary in our view, and sometimes downright annoying.