I took an intensive 9 month German course at did Deutsch Institut in Berlin, it was overall a really nice experience. I was there in order to learn German but I wasn't intending to take place in the TesDaF, but when I finished my course I decided to do it. I got a really good grade in all subjects, and the only thing I can recommend if you intend to take the TestDaf is to attend the TestDaF Preparation Course the did offers, it's an excellent course for its purpose and it's not expensive if you compare it to the benefits you get from it. The Institut it's a very affordable and nice place to learn German, and I can say, based on the results I got, that it has the same or even a better language teaching level than other more expensive laguage schools in Germany. It was definitely one of the best experiences I had.
Von Mine I. (istanbul - Turkey)
im April 2009 - Turkey
I attended a german course at did deutsch-institut in Berlin for a couple of months and prepared for TestDaf (the German TOEFL) and managed to get the highest grade in this exam. I loved the atmosphare of this language school as well as the teachers, materials and many cultural events. After trying many language schools for German, I can definitely say that "did" is the best!