I heard back from Brainlab approximately 2 weeks after my initial application. A phone interview was scheduled, but it was rather a monologue of the interviewer, who gave me a very explicit insight into the position. We talked almost 90 minutes and after all, there were no open questions left. He told me they would get back to me at the end of the following week. I rescheduled other interviews I already had appointments for, because I was really interested in Brainlab as a company and its products. However, I never heard back from them until 5 weeks later when I received an email that I had not been successful. They sent me a standard mail as if the interview had never taken place. By hindsight, I was probably a bit overenthusiastic about the company. They offered a rather low salary ( maybe that's why they refused me, because they did not gain any other significant additional information during the "interview") and they did not show a lot of respect for the situation of their candidates.