I had one phone interview that lasted about 30 minutes. I later had a 4 hour on site interview with 5 different employees. In general, people were very nice and understanding of your current situation. I remember I had a pretty hard set of question given to me by one interviewer, and after that the next interviewer explained to me that they often ask tough questions and to not me stressed out too much about it. Overall, it was a very good experience.