I interview a LOT of candidates, and I make sure that there is always time at the end of the interview for the candidate to ask questions (even if that means running over on my time). Regardless of how well/poorly the interview went, I try to answer honestly and openly, to the best of my abilities. It's not in my best interest (or the company I work for) to hire someone who won't be happy working at the company - they won't be performing their best, and they won't last long.