InstaKey Security Systems interview questions

I applied online through LinkedIn, and about two weeks later I had my initial interview in person with the Director of Sales and Marketing. About a week after the initial interview, I was asked to come back and participate in three, one hour sessions with several members of their team. These members included the CEO, National Account Sales Manager, and the VP of IT. Each of the interviews went relatively well, however the entire process was draining having to answer similar questions for 3 hours in a row. After the final round of interviews, I emailed the director to find out that role had been given to another candidate in the interviewing process.