Results: Have you had DNA testing done to find out about your heritage?

I have always been interested in my background heritage. I did not know my father and by the time I was old enough to do research on him and paying almost $100 my results came back as my father had died. They could not tell me what happened to him, so I wanted to know about my half brother, all I know about him is he is Japanese and white and his name is Jack and lives in CA. They could not help me with that either. So, I would like to know the majority opinion on finding out about heritage.