I just got done with my interview last night as well. I could not get a read on the interviewer at all, so I'm really not sure how I did. I thought it was ok, but could have been better.
The interview time was 8pm. I offered to meet at his hotel lobby, as I figured I didn't want to be bound by the operating hours of a cafe. My interview ended up being 2 hours long, and I didn't even cover a key EC during this time! By no means is a longer interview a better interview, it's the quality. I think where I went wrong was whacking around the bush at the start and not being very concise in my answers. I figured, ah this is a long interview, I can take my time answering - don't do this!
The interviewer was nice and brought me to back on track a couple of times. As I mentioned in an earlier post, the interviewer and I had a lot in common - same undergrad, similar career goals and post-MBA location preference (Asia). He said he would be taking lots of notes, but I don't think he wrote as much as I thought he would. We had good eye contact. All in all, he was a very nice guy.
He did not ask me any difficult questions. I had prepared extensively for industry specific questions, but no questions on that front. He asked the usual, tell me about yourself, why do you intend to leave your current field, why Asia, why LBS, leadership story, leadership style, a time when you had to win the support of someone, weaknesses (come prepared with at least 2 that you can address because I was asked the weakness question twice in a different format). I talked at length about my current industry, why I wanted to leave (both push and pull factors) and where I want to go.
After about 1h20min, it was time for the impromptu presentation. I was very intimidated by this part of the interview process going in. I had prepared as much as I could by searching for questions asked in prior years online, and doing some mock presentations. I recommend you do the same, it will really help. The interviewer himself recommended that I do the following when I present my case (i) state your stand, (ii) define your structure, (iii) reflect how this affects you. I think I did an OK job with the presentation, not great.
One thing I was surprised to learn was the the interviewer has access to your entire application file, not just your essays and resume. My interviewer had even read the recommendations. I didn't think they had access to recommendations, not that it makes any difference to me at least.
After the presentation, he asked me if I had any questions. I could ask him really detailed questions because of our similar interests/background and got some great advice from him.
I sent him a thank you note and he was nice enough to reply to it - I never expect replies from my Thank-You notes!
I guess I'm done with the application process, everything is out of my hands now. All I can do is wait on the sidelines and pray that things go well.
Good luck to others who have their interviews coming up, I hope this short summary was useful.