I had heard great things about Target's ETL program, but wasn't impressed with the interview process. I showed up for my interview early (punctuality is very important to them) and the manager told me that he forgot that I was coming. I sat outside for about 30 minutes until he called me back, and asked me about 10 behavioral questions. (tell me about a difficult decision, etc) which I went through fairly quickly. This format was not my style and I didn't go nearly as in depth as they were looking for. I missed this, but they really just want you to talk. Use the STAR outline for best luck.