I have exactly the opposite opinion, for couple of reasons: 1. interviews are black boxes - there's no feedback; getting feedback from a professional interview

I have exactly the opposite opinion, for couple of reasons: 1. interviews are black boxes - there's no feedback; getting feedback from a professional interviewer is the best way to understand one's weaknesses 2. dealing with pressure in simulated environment can help (a lot, for some) to handle pressure in a real one. I had no idea, for example, why I didn't fare well in a certain type of interview, until I did a mock one.