Mr. Braun may be professionally excellent, but unfortunately he is not humanly so (unlike his co-worker Florian). Refuses to treat a child because he has a one-time problem with the parents. But he is allowed to refuse treatment, he is not a real doctor.
The five stars (quality, examination, advice) are for his employee Florian, who is really great and recommendable, but cannot make up for the character flaws of his boss.
I would recommend Florian, but not Mr. Braun.